The board has a buzzer that sounds momentarily when the loop makes contact with the wire. It also has an LED, which latches on when the buzzer sounds via the use of a thyristor. It then remains on so that even the briefest contact of the loop with the wire can be indicated. A push button is used to reset the LED. The cables are supplied on reels with the remaining parts being individually bagged.

Requires x3 AA batteries, available separately.