Site safetyFrom the maker's public info

TWIG One

Twig Com · Finland

A belt-worn lone worker alarm with an SOS key, optional automatic man-down alerts and loud hands-free calls.

TWIG One is an 89.5 g alarm made in Finland by Twig Com for people working alone on noisy or hazardous industrial sites. Its SOS key, an optional man-down sensor or an expired Amber alert timer sends an alarm with the worker's position and opens a hands-free call. Alarms go to an alarm receiving centre, the maker's TWIG Point cloud service or a phone by SMS, over 2G/3G/4G or, with the right options, Wi-Fi.

Weight with battery: 89.5 g
Dust and water protection: IP67
Maker's figure, hourly reports: 9 days
Operating temperature: −20 to 50 °C

Maker's product page Jump to the sheet

Model: TLP53EU
Written from: twigcom.com
Information as of: 2026-10-11
Local partner: Not in public info

Reduces

Lone workers unable to call for help after a fall, injury or other emergency

Suitable for

Lone work in noisy and hazardous industrial settings; the maker names construction, maintenance and forestry. It locates by satellite outdoors and, with the SRD3 option plus beacons or Wi-Fi, inside buildings.

Not suitable for

Places where the device cannot reach its alarm receiver over the link it is set up to use: outside mobile coverage for cellular versions, or outside a configured 2.4 GHz Wi-Fi network for Wi-Fi alerting (TLP53EU with SRD3 and firmware CT5P.02.010.000 or later; 5 GHz is not supported). Indoor positions need beacons or Wi-Fi, as satellite fixes are usually unavailable. Explosive atmospheres call for the ATEX-approved TWIG One Ex instead.

The maker's warnings (10)

01 · Functions

Alarm functions built into the device

TWIG One pairs a manual SOS key with automatic alerts and a loud speakerphone. Several functions are device options chosen when ordering (maker's datasheet).

SOS key and SOS cycle
A raised SOS key starts the SOS cycle: the device calls through up to 10 preset numbers and sends its position. The key can be set to need a 1–5 s hold or a double press to limit accidental alarms.
Automatic man-down alarm
The optional man-down function watches device orientation, lack of movement, impact and free fall. Before the alarm goes out, a pre-alarm by tone, display and vibration lets the worker cancel it.
Amber alert check-in timer
Before a risky task the worker starts a timer with the yellow-marked key. If it is not reset in time, the device pre-alarms and then raises the alarm. In server-based mode the receiving centre escalates even if coverage is lost.
Loud hands-free speakerphone
A high-power speakerphone with two microphones carries two-way calls in noisy places, and a strong vibrator and alarm tones signal pre-alarms and incoming calls. Calls run over 2G, 3G or 4G (VoLTE), or as VoIP over Wi-Fi with the option.
Position outdoors and indoors
Satellite positioning combines GPS, GLONASS and Galileo, with assistance data from TWIG Point for faster fixes. With the SRD3 option, TWIG SRD beacons, Wi-Fi base stations or Bluetooth LE beacons locate the device indoors.
Remote set-up and NFC check-ins
Settings and firmware can be updated over the air through TWIG Point, or by USB with the TWIG Configurator PC app. An optional NFC reader logs attendance from tags, and TWIG SRD buttons and door sensors can be paired.

02 · Alarm flow

How an alarm travels from the belt to a responder

The device is one part of a system. Who receives the alarm, and how, depends on how the service provider sets it up.

01
The alarm is triggered
The worker presses the SOS key, or the device raises the alarm itself after a man-down trigger or an unanswered Amber alert timer. Automatic alarms are preceded by a pre-alarm that the worker can cancel.
02
A message with position is sent
The device sends a message giving the cause, its satellite or beacon position, speed, heading and battery level. It uses Twig Com's MPTP protocol by SMS or mobile data, or over Wi-Fi where configured.
03
The receiver takes the alarm
Depending on set-up, the alarm reaches an alarm receiving centre whose software supports MPTP, the TWIG Point Monitor cloud service with maps and floor plans, or a smartphone as an SMS with a map link.
04
Voice contact until help arrives
A two-way hands-free call opens to the receiver. The operator can request a fresh position, send on-screen messages and call the device back from an authorised number.

03 · Connectivity

Connectivity depends on the version and options ordered

Twig Com builds TWIG One with different radio options. Whether an alarm gets through depends on the link each device is set up to use.

Cellular 2G/3G/4G
Used for
Alarms by SMS or data; voice calls, including VoLTE
Conditions stated by the maker
GSM 900/1800 MHz; WCDMA bands 1, 3, 5, 8; LTE-FDD bands 1, 3, 5, 7, 8, 20, 28; LTE-TDD bands 38, 40. Needs a SIM and mobile coverage.
Wi-Fi alongside cellular
Used for
Alarm messages (MPTP) and VoIP calls
Conditions stated by the maker
TLP53EU with SRD3, firmware CT5P.02.010.000 or later, 5th character of the serial number a letter. 2.4 GHz only, up to 5 networks. Link priority is configurable; if Wi-Fi delivery fails, cellular is used.
Wi-Fi-only version
Used for
Alarms and VoIP calls without a mobile network
Conditions stated by the maker
No SIM needed and no cellular link; delivered without GNSS.
2G-only type TLP50EU
Used for
Alarms and calls over GSM
Conditions stated by the maker
Listed as an optional device feature in the current datasheet.
Satellite positioning (GNSS)
Used for
Outdoor position
Conditions stated by the maker
GPS, GLONASS and Galileo; warm start < 10 s, cold start < 35 s. TWIG Point AGNSS speeds up fixes and needs mobile data. Usually unavailable indoors.
Indoor beacons (SRD3)
Used for
Indoor position, with floor level from on-site beacons
Conditions stated by the maker
TWIG SRD beacons (869 MHz), Wi-Fi base stations and BLE beacons, managed with TWIG Point Netloc and Site.
NFC reader
Used for
Attendance check-ins from tags
Conditions stated by the maker
Optional, 13.56 MHz.

Link	Used for	Conditions stated by the maker
Cellular 2G/3G/4G	Alarms by SMS or data; voice calls, including VoLTE	GSM 900/1800 MHz; WCDMA bands 1, 3, 5, 8; LTE-FDD bands 1, 3, 5, 7, 8, 20, 28; LTE-TDD bands 38, 40. Needs a SIM and mobile coverage.
Wi-Fi alongside cellular	Alarm messages (MPTP) and VoIP calls	TLP53EU with SRD3, firmware CT5P.02.010.000 or later, 5th character of the serial number a letter. 2.4 GHz only, up to 5 networks. Link priority is configurable; if Wi-Fi delivery fails, cellular is used.
Wi-Fi-only version	Alarms and VoIP calls without a mobile network	No SIM needed and no cellular link; delivered without GNSS.
2G-only type TLP50EU	Alarms and calls over GSM	Listed as an optional device feature in the current datasheet.
Satellite positioning (GNSS)	Outdoor position	GPS, GLONASS and Galileo; warm start < 10 s, cold start < 35 s. TWIG Point AGNSS speeds up fixes and needs mobile data. Usually unavailable indoors.
Indoor beacons (SRD3)	Indoor position, with floor level from on-site beacons	TWIG SRD beacons (869 MHz), Wi-Fi base stations and BLE beacons, managed with TWIG Point Netloc and Site.
NFC reader	Attendance check-ins from tags	Optional, 13.56 MHz.

VoIP calls need a SIP account and use UDP only; the TWIG Point SIP server requires the All inclusive plan. Sources: datasheet EZ6800-05-EN, Wi-Fi instructions YZ6710-04, maker news of 18 July 2023.

TWIG One on a concrete floor beside the outstretched arm of a person lying down, its display counting — A man-down situation as staged by the maker.Photo: Twig Com

04 · Man-down

Three levels of man-down detection

Twig Com describes three man-down levels. Tilt angle and motion sensitivity are set for each device to suit how and where it is worn.

Settings decide how reliable the alarm is. The maker advises matching them to the task and environment, training users on the function and its limits, and wearing the device as configured. Alarms can be loud or silent, the message states the cause, and a periodic beep can help responders find an unconscious person.

Man Down: tilted beyond the set angle and moving less than the set threshold.
Man Down+: movement below the threshold alone, for example fainting without a fall.
Man Down++: a sudden impact or a free fall.

05 · Specs

TWIG One (TLP53EU) specifications

Mainly from the maker's datasheet EZ6800-05-EN (2023); accessory, Wi-Fi, TWIG One Ex, TWIG Point and service details come from the maker's other documents and pages listed below.

Device

Dimensions: 102.2 × 49.2 × 19.7 mm
Weight: 89.5 g including battery
Protection: IP67 (tested to the IEC 60529 method); shock resistant
Display: LCD with guiding symbols; on-screen messages
Keys: SOS key; Amber alert and man-down keys; 4 numeric keys; menu and function keys; tactile silicone keypad
Audio: Speakerphone with 2 microphones; vibrator
SIM: Nano SIM in a robust tray

Radio and location

GSM: 900/1800 MHz
WCDMA: Bands 1, 3, 5, 8
LTE: FDD bands 1, 3, 5, 7, 8, 20, 28; TDD bands 38, 40
Wi-Fi (option): 2.4 GHz only; alarm messages and VoIP calls; needs SRD3 and firmware CT5P.02.010.000 or later
Satellite (option): GPS, GLONASS, Galileo; warm start < 10 s, cold start < 35 s
Indoor location (option): SRD3: TWIG SRD, Wi-Fi and BLE beacons
NFC (option): Reader, 13.56 MHz
Protocol: TWIG MPTP over SMS and IP; SSL/TLS server connection

Battery and environment

Battery: 1350 mAh Li-ion, built in
Operating time (maker's figures): 9 days at 1 report an hour; 5 days at 1 per 10 min; 33 h at 1 per minute; 10 h at 1 per 5 s; up to 12 days on cellular standby
Charging: Under 4 h to 95 %; only between 0 and 45 °C
Operating temperature: −20 to 50 °C

Package, accessories and variants

Standard package: Device with built-in battery; mains charger with EU, UK or AU adapter; charging adapter
Wearing: Belt clip (AFB, rotates 90°) or leather carrying case (AFO); both optional
Charging accessories: Charging station (AFC), smart charging station (AFS), programming station (AFP), 5-device multi-charger, car charger
SRD accessories: TWIG Beacon, Remote Button, Door Sensor and Mandown Button (SRD)
Other versions: TLP50EU 2G only; Wi-Fi only (no SIM, no GNSS)
TWIG One Ex (ATEX version): II 2 G Ex ib IIC T4 Gb, II 2 D Ex ib IIIC T130 °C Db; 102.1 × 48.9 × 24.6 mm, 130 g; −20 to 60 °C

Software and services

TWIG Point (cloud): Monitor (alarms, tracking, maps and floor plans), Remote Configurator, Netloc indoor location, AGNSS, Site, API; plans from Free to All inclusive
PC tools: TWIG Configurator, TWIG FirmwareLoader
Integration: TWIG Integrator Kit (MPTP) for alarm receiving centres; third-party monitoring software
Maker services: Warranty extension by 1 or 2 years, factory settings, SIM provisioning, battery service, mid-life upgrades

06 · Videos

Product videos from Twig Com

Animations without narration; the on-screen text is in English. Both also show the ATEX version, TWIG One Ex.

TWIG One and TWIG One Ex personal alarm devices
TWIG personal alarm devices · 4:06 · English
Plays from YouTube once started. Open on YouTube
Robust TWIG lone worker alarms for demanding and ATEX environments now with Wi-Fi communication
TWIG personal alarm devices · 4:06 · English
Plays from YouTube once started. Open on YouTube

07 · Cautions

Conditions and warnings from the maker

Our summaries of conditions in the maker's public documents, each with the maker's own wording.

Our summary, then the maker's own words

Communication depends on coverage. The datasheet limits it to mobile network coverage, and the Wi-Fi option only adds the Wi-Fi networks set up in the device. Check both at each work location.
In the maker's words: Communication is only possible within mobile network coverage. twigcom.com
Wi-Fi alerting works only on 2.4 GHz networks set up in the device (up to five); 5 GHz is not supported. If sending over Wi-Fi fails, messages go over the mobile network instead.
In the maker's words: Wi-Fi compatible TWIG personal alarm devices support only 2,4 GHz Wi-Fi network. twigcom.com
Satellite positions are generally not available inside buildings. Indoor location needs the SRD3 option plus TWIG SRD beacons, Wi-Fi base stations or BLE beacons on site.
In the maker's words: Lack of satellite connection and the requested accuracy of indoor location require a different solution for indoor positioning. twigcom.com
Man-down settings must suit the task and environment to avoid both false and missed alarms, and users need training on the function and its limits.
In the maker's words: In order to minimize false alarms or missing alarms, the mandown settings need to be carefully matched with the usage scenario and environment. twigcom.com
Wear the device in the position its man-down settings assume; another position can cause false or missed alarms.
In the maker's words: Incorrect wearing positions can lead to false alarms or missed detections, compromising the safety of the lone worker. twigcom.com
The standard TWIG One's datasheet lists no ATEX approval. For explosive atmospheres the maker offers the ATEX- and IECEx-approved TWIG One Ex.
In the maker's words: Hazardous environments with explosive atmospheres require use of ATEX devices enabling safe operation where standard devices may pose ignition risks. twigcom.com
Charge only between 0 and 45 °C, even though the device operates from −20 to 50 °C.
In the maker's words: Charging only above 0°C and below +45°C. twigcom.com
Battery figures are typical values: 9 days assumes one report an hour, and frequent tracking cuts this to hours. Plan charging around the reporting interval actually set.
In the maker's words: Operating times may vary substantially depending on environment. twigcom.com
Correct behaviour depends on the service around the device. The maker's BS 8484 declaration holds only with a compliant lone worker service, and the service supplier must deploy the right settings.
In the maker's words: TWIG devices are configurable to a wide variety of applications and use cases, and it is critical that the right settings are deployed by the LWS supplier. twigcom.com
The TWIG Point cloud service targets 99.95 % monthly uptime, but its service level agreement says it is not built to be error-free or uninterrupted. Support runs 9:00–15:00 Finnish time.
In the maker's words: the Service is not designed to be error-free or uninterrupted twigcom.com

08 · Sheet

Side by side, on the same sheet.

Every product in the catalog is described with the same fields, in the same order, so you can compare them side by side. What it reduces and where it fits are at the top of this page.

Key specs: Belt-worn alarm, 102.2 × 49.2 × 19.7 mm, 89.5 g with battery, IP67 and shock resistant. SOS, Amber alert and man-down keys; loud hands-free speakerphone. Cellular 2G/3G/4G (LTE bands 1, 3, 5, 7, 8, 20, 28, 38, 40). Options: man-down with four triggers, GNSS (GPS, GLONASS, Galileo), SRD3 for indoor location by SRD, Wi-Fi or BLE beacons and for alerts and VoIP over 2.4 GHz Wi-Fi, a Wi-Fi-only version, NFC reader. 1350 mAh battery: 9 days at one report an hour, up to 12 days on standby (maker's figures). Operates at −20 to 50 °C; charges at 0–45 °C.
Price conditions: Not in public info
Trial: Not in public info
Lead time: Not in public info
Service and repair: The length of the original warranty is not published. The maker offers to extend it by 1 or 2 years, plus a battery service and factory configuration (maker's terms); repairs and technical issues go to support@twigcom.com. Its general terms of trade sell products “as is” and leave suitability for a purpose to the user.
Local partner: Not in public info
StandardsMaker's declaration: EU Declaration of Conformity for type TLP53EU (TWIG One, TWIG Easy) under RED 2014/53/EU, 2022: EN 62368-1:2014+A11:2017; EN 50566, EN 50360, EN 62209-1/-2 (SAR); EN 301 489-1/-3/-17/-19/-52; EN 300 220-1/-2/-3-2, EN 300 328, EN 300 330, EN 301 511, EN 301 908-1/-2/-13, EN 303 413; EN IEC 63000:2018. RED cybersecurity EN 18031-1:2024 (2025). IP67 tested to the IEC 60529 method. DGUV Test certificate ET 25006 with GS mark for the TWIG Point system including TWIG One (DIN VDE V 0825-1/-11), valid to 2029. The maker's BS 8484:2016 declaration names only the earlier types TLP50EU and TLP51EU.

09 · Documents

Documents and links.

Official files and pages from Twig Com. Each opens on the maker's site.

10 · Maker

Twig Com

Finland

Twig Com makes lone worker alarms and the TWIG Point cloud service used to monitor them. The company was formed in 2011 through a management buy-out of the TWIG personal alarm business, which grew out of Benefon, a Salo mobile phone maker founded in 1988. It designs, builds and tests its devices in-house in Salo and sells through authorised partners in Europe, Australia, Turkey and Mexico.

Founded: 2011
Headquarters: Salo, Finland
Website: twigcom.com

Sources57

Read on 2026-10-11. Each date below is the version we read: an archived copy's capture date, or a document's own date.

Twig Com: TWIG One product page (English)twigcom.com · 2026-10-11
Twig Com: TWIG One product page (German)twigcom.com · 2026-10-11
Twig Com: TWIG One product page (French)twigcom.com · 2026-10-11
Twig Com downloads: TWIG One datasheet pagetwigcom.com · 2026-10-11
Application instructions for Wi-Fi communication YZ6710-04 (PDF)twigcom.com · 2026-10-11
EU Declaration of Conformity, TWIG One and TWIG Easy, type TLP53EU, 1 June 2022 (PDF)twigcom.com · 2026-10-11
EU/UK Declaration of Conformity (ATEX and RED), TWIG One Ex types TLP50EU, TLP51EU, TLP53EU, 16 Dec 2022 (PDF)twigcom.com · 2026-10-11
Declaration of Conformity to BS8484:2016 Section 5, 19 Oct 2020 (PDF)twigcom.com · 2026-10-11
EU Declaration of Conformity, RED cybersecurity EN 18031-1:2024, 26 Aug 2025 (PDF)twigcom.com · 2026-10-11
ATEX safety instructions YZ5406 (PDF)twigcom.com · 2026-10-11
Twig Com Ltd. General Terms of Trade (PDF)twigcom.com · 2026-10-11
Twig Com End User Terms of Service, version 1.1, October 2019 (PDF)twigcom.com · 2026-10-11
Twig Com Service Level Agreement, version 1.1, October 2019 (PDF)twigcom.com · 2026-10-11
Twig Com: downloads librarytwigcom.com · 2026-10-11
Twig Com: lone worker safety featurestwigcom.com · 2026-10-11
Twig Com: Wi-Fi communication in lone worker safetytwigcom.com · 2026-10-11
Twig Com: 4G and VoLTEtwigcom.com · 2026-10-11
Twig Com: indoor locationtwigcom.com · 2026-10-11
Twig Com: mandown alarmtwigcom.com · 2026-10-11
Twig Com: Amber alerttwigcom.com · 2026-10-11
Twig Com: water and dust prooftwigcom.com · 2026-10-11
Twig Com: GNSStwigcom.com · 2026-10-11
Twig Com: alarm monitoringtwigcom.com · 2026-10-11
Twig Com: attendance monitoringtwigcom.com · 2026-10-11
Twig Com: TWIG Point alarm monitoring platformtwigcom.com · 2026-10-11
Twig Com: software and toolstwigcom.com · 2026-10-11
Twig Com: short range devicestwigcom.com · 2026-10-11
Twig Com: accessoriestwigcom.com · 2026-10-11
Twig Com: servicestwigcom.com · 2026-10-11
Twig Com: customer care (support)twigcom.com · 2026-10-11
Twig Com: quality and compliancetwigcom.com · 2026-10-11
Twig Com: ATEX lone worker alarmstwigcom.com · 2026-10-11
Twig Com: TWIG One Ex product pagetwigcom.com · 2026-10-11
Twig Com: DGUVtwigcom.com · 2026-10-11
Twig Com: personal emergency signal systemtwigcom.com · 2026-10-11
Twig Com: lone worker alarms overviewtwigcom.com · 2026-10-11
Twig Com: lone worker safety in constructiontwigcom.com · 2026-10-11
Twig Com: lone worker safety in maintenancetwigcom.com · 2026-10-11
Twig Com: lone worker safety in forestrytwigcom.com · 2026-10-11
Twig Com: our journey (history)twigcom.com · 2026-10-11
Twig Com: authorised TWIG partnerstwigcom.com · 2026-10-11
Twig Com news, 23 June 2020: TWIG One now for saletwigcom.com · 2026-10-11
Twig Com news, 18 July 2023: Wi-Fi communication feature releasedtwigcom.com · 2026-10-11
Twig Com news, 3 November 2021: how to use mandown alarm with TWIG Neotwigcom.com · 2026-10-11
Twig Com news, 17 March 2025: DGUV certificationtwigcom.com · 2026-10-11
Twig Com article, 10 July 2025: how we earned DGUV certificationtwigcom.com · 2026-10-11
Twig Com article, 27 June 2025: lone worker safety made in Finlandtwigcom.com · 2026-10-11
YouTube, TWIG personal alarm devices: TWIG One and TWIG One Ex personal alarm devicesyoutube.com · 2026-10-11
YouTube, TWIG personal alarm devices: TWIG One and TWIG One Ex now with Wi-Fi communicationyoutube.com · 2026-10-11
YouTube, TWIG personal alarm devices: How to use man down alarm? (description text)youtube.com · 2026-10-11
Internet Archive copy of the maker's page for Quick Guide YZ6700-EN (TWIG One, Neo, Easy, SOSCard)twigcom.com · Web archive · 2024-03-04
ManualsLib (third party): TWIG Quick Guide YZ6700-02, used only to corroboratemanualslib.com · 2026-10-11

We wrote this page from Twig Com's public website and documents as of 2026-10-11. Twig Com has not confirmed anything on it and is not involved with this site. Photos and videos are Twig Com's own, each linked to where it appears. Items the maker does not publish are marked “Not in public info”. Standards are the maker's declarations; we do not judge compliance.

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At a glance

Reduces

Suitable for

Not suitable for

Alarm functions built into the device

SOS key and SOS cycle

Automatic man-down alarm

Amber alert check-in timer

Loud hands-free speakerphone

Position outdoors and indoors

Remote set-up and NFC check-ins

How an alarm travels from the belt to a responder

The alarm is triggered

A message with position is sent

The receiver takes the alarm

Voice contact until help arrives