this unit has now been replaced with the 3M Peltor WS Alert XP MRX21A2WS6 Headband Headset Black

https://www.earshotcommunications.co.uk/shop/product/3m-peltor-ws-alert-xpi-mrx21a2ws6-headband-headset-black/

3M™ PELTOR™ WS™ Alert XP Headset MRX21AWS5

With a built-in FM-radio receiver, Bluetooth® and a level dependent function, PELTOR WS Alert XP enables users to have wireless telephone conversations or listen to their favourite music even in noisy environments.

Memory/preset function
Level dependent function that lets you hear ambient sound: conversation, machine sounds and warning signal
Ghost voice guided interface
Re-chargeable with NiMH batteries
External input
Bluetooth range up to 10 m (Class 2).

Specifications

Attenuation rating (HML)‎	‎ H=33 M=26 L=20
Attenuation rating (SNR)‎	‎ 29 Decibel
Battery Life‎	‎ 32 Hours
Colour‎	‎ Black
Communication Type‎	‎ Wireless Bluetooth®,‎ Level Dependent,‎ FM Radio
Connection Type‎	‎ Wireless Bluetooth®
Features‎	‎ Built in FM Radio Receiver
Function‎	‎ Bluetooth
Hearing Protection Style‎	‎ Headband
Net Weight‎	‎ 430 g
Product Series‎	‎ Alert,‎ WS Series
Product Type‎	‎ Communications Headsets
Standards/Approvals‎	‎ CE Approved
User Type‎	‎ Military & Police,‎ Hunting & Shooting,‎ Industry