Lone Worker & WHS Duress Alarms
Premium 4G Lone Worker Alarms - Custom duress firmware available
Perfect for workers in any profession, our devices double as a duress SOS alarm — simple to use, GPS tracked, and ready to call for help the moment you need it, wherever the job takes you.
Any of our watches or pendants can be used for lone worker purposes — explore our full range of medical alarms here.
Our NHA Life Alarm is a durable, feature-packed pendant built for the workforce. While it's already one of our most popular medical alarms, its full feature set makes it especially well suited to lone worker duress situations — arguably better than any other alarm currently on the market.
Custom Duress Firmware — On Any of Our Alarms
Every alarm in our range can be fitted with custom duress firmware. It's still the same device your team already knows how to use — we simply reprogram it to do more, without changing the hardware itself.
Custom Screen Identifiers
Instead of an obvious "SOS ACTIVATED" message, the on-screen text can be customised to show a discreet identifier or code that only means something to your organisation — so a glance at the screen doesn't give anything away.Custom Activation Sequences
We can program a specific button sequence — a long press, a hidden double-tap, or another pattern of your choosing — to trigger a silent duress alert, separate to the standard loud SOS activation. Same device, with an extra layer only your team knows about.Silent Alarm, Contacts Listening In
Once triggered, contacts can listen in on the situation without the offender ever knowing an alarm has been raised. We can even set it so only the contact — not the user — is able to cancel the alert, so an offender can't force it to be cancelled.Same Alarm, More Capability
This isn't a separate, specialised product — it's the same reliable alarm your organisation already uses, customised at the firmware level. Standardise your whole fleet on one device, and still equip higher-risk roles with covert duress capability where it's genuinely needed.Speak to our team about which of our alarms can be customised for your organisation's specific duress requirements.
4G NetworkDevice work on the go
GPSReal-Time Tracking
Custom FirmwareTell us what it should do
Australian BasedSupport Team
Built for High-Risk Roles Like Security
From late-night retail security to crowd control and mobile patrols, security staff face some of the highest confrontation risks of any lone worker role. Our alarms — including custom duress firmware and Stealth Mode on the Emergency Alarm — give security teams a discreet way to call for backup without escalating a situation.
Perfect for All Types of Workers
Built to handle tough Australian conditions — whether that's working outside all day, patrolling the beach as a lifeguard, or facing heat, dust, rain and sweat on the job. Our alarms are designed to keep up wherever the work takes you.
Trusted by Nurses, Doctors and Allied Health Staff
Home visits, night shifts and after-hours callouts put healthcare workers in unpredictable situations, often alone with a patient in an unfamiliar environment. Nurses, occupational therapists, doctors and support staff rely on our alarms for a fast, discreet way to raise the alarm — with GPS location sharing so help knows exactly where to go.
Explore Our Range — Which Alarm Suits Your Lone Worker Application?
All available with duress or custom firmware
Flagship Device
NHA Life Alarm (4G)
Our all-purpose lone worker solution — a rugged, GPS-tracked pendant with SOS button, fall detection, and the ability to call or text up to 8 contacts. Runs on genuine 4G, with two-way voice communication once an alert is raised.
Best for: trades, couriers, cleaners & healthcare workers
High-Risk & Duress Use
NHA Emergency Alarm 4G
Built for higher-risk roles on the same reliable 4G platform, with Non-Movement (Sedentary) alerting and Stealth Mode — a silent, discreet activation option for situations where a loud SOS could make things worse.
Best for: security, retail & personal duress situations
NHA Medical Watch Slimline
Worn as a watch, pendant or brooch — three devices in one — for lone workers who'd rather their alarm not look like an alarm. Comes in a wide range of strap colours to match any uniform or workwear.
Best for: corporate & client-facing roles, real estate
How Do Our Lone Worker Alarms Help Your Organisation?
Any worker facing a risk on the job — whether that's a tradesperson on a remote site, a nurse conducting a home visit, or a retail worker closing up alone — benefits from having an instant way to call for help. Our range of medical alarms is built around that same core idea: press a button, and the device takes care of the rest.
Depending on the model, that can mean calling and texting a set of pre-arranged contacts, sharing the user's GPS location, opening two-way voice communication, or alerting a monitoring centre — all from a small pendant, watch, or wall-mounted button suited to the environment.
For your organisation, many of our devices also allow office-based tracking, so you're never left wondering whether a worker is still on site, running late, or has gone quiet without reason.
Wear on ID Lanyard or Clip to Belt
Core Capabilities Across Our Range
Exact features vary by device — see the full range further down the page for what's included on each model.
SOS ActivationPress a single button to alert contacts and start the emergency process.
GPS Location SharingPinpoint the user's location in an emergency or at times of concern.
Calls & Text AlertsAutomatically call and text pre-set contacts so help can be organised fast.
Two-Way VoiceSpeak directly with contacts through the device once an alert is raised.
Fall DetectionAutomatically detects a fall and raises an alert, on selected models.
Geo-FencingGet notified if a device leaves a defined safe area, on selected models.
Organisation-Level TrackingCheck a worker's location or status remotely if there's ever any concern.
Discreet & Stealth OptionsCertain models can raise an alert silently, without alerting anyone nearby.
Every device is built around this same core toolkit — the difference between models is discretion, durability, and how the alert is raised. See "Explore Our Range" below for the full breakdown.
Frequently Asked Questions
A few common questions about our lone worker and duress alarms — click any question to expand.
What is a lone worker alarm, and do we need one?
A lone worker alarm is a wearable or portable device that lets someone working alone quickly call for help in an emergency — usually with an SOS button, GPS location sharing, and the ability to contact pre-set people. If any of your staff work solo, out of sight of colleagues, in remote locations, or in roles with a real risk of confrontation, a lone worker alarm can form a useful part of your WHS duress procedures.
How does the SOS button actually work?
Pressing the SOS button triggers the device to call and text pre-set contacts, sharing the user's GPS location so help can be organised quickly. Once a contact answers, most models open two-way voice communication through the device's speaker, so they can talk directly with the person in need.
What's the difference between the NHA Life Alarm and the NHA Emergency Alarm?
Both run on the same reliable 4G platform with SOS, fall detection and GPS tracking. The Emergency Alarm 4G builds on this with features aimed at higher-risk roles — including Non-Movement (Sedentary) alerting and Stealth Mode, a silent activation option for situations where a loud SOS could escalate the danger.
What is Stealth Mode, and how is it different to a standard SOS alert?
A standard SOS alert is loud and visible — beeping and an on-screen message. Stealth Mode raises the alert silently and discreetly instead, with no beeps, lights, or obvious sign that help has been called. Contacts can be notified and can listen in on the situation without the person in danger needing to say a word or draw attention to the device.
Can we get custom duress firmware for our organisation?
Yes — every alarm in our range can be fitted with custom duress firmware, including custom on-screen identifiers and custom activation sequences. It's the same device your team already knows, reprogrammed to suit your specific requirements. Speak to our team about what's possible for your organisation.
How many contacts can be alerted, and can we use professional monitoring instead?
Our pendant alarms can contact up to 8 pre-set contacts. You can choose to have those contacts be your own staff, family, or nominated colleagues — or opt for professional monitoring instead, where a 24/7 monitoring facility responds on your behalf. Speak to our team about which option suits your organisation.
Do the alarms require an app to use?
No. The Life Alarm, Emergency Alarm and Medical Watch Slimline are fully programmed by our team before dispatch and are ready to use straight out of the box — no app, login, or setup required.
Are the alarms waterproof and durable enough for outdoor or physical work?
Yes — our pendant and watch-style alarms are designed for daily wear on the job, holding up against rain, sweat, dust and general physical work, which makes them suitable for tradespeople, lifeguards, and anyone working outdoors. We wouldn't recommend deep-sea diving with one, but for almost any Australian workplace, they're built to keep up.
Will the alarm work everywhere, including underground or inside buildings?
Our alarms run on the 4G mobile network, so they work almost anywhere there's mobile coverage. Like any mobile device, signal can be reduced underground, inside some buildings, in vehicles, or in areas with poor network coverage — worth keeping in mind if your team regularly works below ground or in heavily shielded structures.
How is the device charged, and how long does the battery last?
The device should be charged daily, and battery life typically lasts between 1 and 10 days depending on use, settings and signal strength. Battery level is shown on-screen, and select models can send a low-battery alert to contacts so charging is never left to guesswork.
Can our office track a worker's location remotely?
Yes — many of our devices allow office-based tracking via a mobile phone, so you can check a worker's location or status at any time if there's ever concern about their whereabouts, without needing to wait for an emergency to occur.
Do you supply lone worker alarms in bulk for organisations?
Yes — we work with organisations of all sizes, from a handful of devices through to large fleets, and can also discuss wholesale and trade account options for interested distributors. Contact our team to discuss your requirements.
Trusted for Commercial & Business Use
Whether you're equipping a small team or an entire organisation, our lone worker alarms are a straightforward way to add duress protection across your business — no complex setup, just a device ready to protect your staff from day one.
Ready to Protect Your Team?
For more information on our Lone Worker Alarms or Medical Life Alarms, contact our office on 1800 963 000. We proudly supply Australia-wide, and can also discuss wholesale options for interested distributors.
