The Hard-Wired Communications System is a fully duplex communications system designed specifically for EOD teams using the MK5 and MK5A EOD Bomb Disposal Suits.
The system provides communication between the bomb disposal operator and his back-up team. It consists of a plug which connects to the helmet's in-built earpiece and microphone, 100 metres of twisted-core signal cable mounted on a spool, a headset, speaker/amplifier, complete with carrying bag.