The RA5.12 is a high performance microphone probe for covert listening operations through small gaps, keyholes and drilled holes.
The insertion probe is 5mm diameter x 330mm working length. A removable 1 metre lead connects the probe with an amplifier unit which is mountable on the belt of the operator.

A simple knob switch is on the front panel of the amplifier. Turn clockwise to switch on the unit, and further clockwise to increase the volume. A green LED indicator shows that the power is on.
Headphones are plugged into the front panel via the 3.5mm jack socket.

To charge the unit, simply plug in the 3-pin connector from the supplied charger to the side of the unit.
The system will work for up to 7 hours from a full battery charge.