Blackline Safety Loner Duo

Blackline Safety’s Loner Duo, when paired with their Loner Mobile App enhances overall lone worker safety & monitoring capabilities.

Loner FDU

Employee Safety Monitoring Accessory

Loner® DUO is an accessory to use with the smartphone application Loner Mobile. Designed to enhance overall employee safety monitoring capability.

With Bluetooth® wireless communication and by pairing the Loner DUO with a smartphone running the Loner Mobile app, Loner DUO supports Loner Mobile with features including an Emergency Latch, True Fall Detection®, No-Motion (man-down) Alert, Silent Emergency (duress) Alert, and Missed Check-in Alerting for added protection.


loner Duo FEATURES

Safety Alert Modes

Emergency Latch, True Fall Detection®, No-Motion (man-down) Alert, Silent Emergency (duress) Alert, Missed Check-in Alert.

Bluetooth® Wireless Technology

Connects to Blackline’s Loner Mobile safety app running on a compatible smartphone.

Instant Monitoring

Loner Mobile communicates Safety Alerts to Blackline Background Services; Safety Alerts communicated to monitoring personnel via email and SMS; Loner® Portal displays all alerts, contact info, location data and statuses.

Durable Safety Device

Built to withstand a 6′ fall onto concrete; Designed to meet IP65 ingress protection against weather and dust.


Loner Duo Specifications

Size & Weight [W x L x D]

Size: 51 mm x 32 mm x 62 mm (2.01 in x 1.26 in x 2.44 in);
Weight: 75 g (2.65 oz).

Safety Features

Fall detection technology: Tri-axis accelerometers, tri-axis gyros, plus software processing; Emergency latch: Release latch to trigger emergency alert; Worker motion monitoring: Configurable time window (1 – 10 min); Worker check-in (optional): Required check-in period (5 – 180 min).

Buttons & Indicator Lights

Power button: Power on/off; Acknowledge button: Check-in, Silent emergency, Cancel pending alerts, Acknowledge alerts; Emergency latch: Send emergency alert; Red indicator light array plus vibration and buzzer: Safety alert triggered; Green indicator light: Blinking (powered), continuous (connected).

User Notification

Indicators: Acoustic buzzer, LEDs, and vibration motor; Acoustic buzzer sound pressure level: ~80 dB @ 30 cm (~80 dB @ 11.81 in).

Wireless Communication

Bluetooth version 2; Class 2

Alert Messages

Fall detected, Emergency, No Motion, Missed check-in, Low battery, Power off, Silent emergency.

Mobile Messaging Methods

Email, Text message (SMS)

Power & Battery

Rechargeable Li-ion battery: 350 mAh capacity; Battery life: 12 hours continuous operation; Charging connector: 4 pin sealed connection.


Storage temperature: -30° C to 75° C [-22° F to 167° F]; Operating temperature: -20° C to 55° C [-4° F to 131° F]; Charging temperature: 0° C to 45° C [32° F to 113° F]; Ingress Protection: Designed to meet IP65.


FCC Part 15 Subpart J

Device Requirements

Bluetooth communication must be paired to smartphone. Loner Mobile must be installed on smartphone and be activated within Loner Portal.


One year limited factory warranty.

Loner Portal Web App

Features Include: Alarm banner, event history, device location mapping, device man­agement, alert & notification settings.



Accessory Service

Loner DUO is an accessory for Blackline’s Loner Mobile smartphone application. There is no additional service plan required to use Loner DUO with Loner Mobile.



Accessory Coverage

Loner DUO leverages the wireless communication and coverage of a smartphone application that hosts Blackline’s Loner Mobile smartphone application. Coverage is dependent upon the smartphone’s wireless data plan.

"Lone workers are those who work by themselves without close or direct supervision."

We understand that lone worker safety is not a ‘one size fits all' proposition - and therefore different jobs have different risk profiles that in turn impact on the best solution for that person.

To find out more, tell us your requirements or to request a live demonstration of our service email give us a call on 0800 626 3696