Set consisting of Bite alarm: approx. 150 m range, 6 volume levels, 7 different sound types, 4 different sensitivity settings, night light function, optical & acoustic fall bite detection, battery voltage detection, theft protection, integrated snag bars. Requires 1 x 9 volt block battery (please order separately). Receiver: approx. 150 m range, 4 different coloured LEDs, 6 volume levels, sound synchronisation with bite alarm, vibration alarm (optional), 3 different alarm modes, can be coupled with Camp Security, fall bite detection, theft protection (alarm signal). Requires 1 x 9 volt block battery (please order separately).