The bite indicators in this set have 5 volume settings plus silent, 4 sensitivity levels, 7 pitch settings, white scroll wheel, LED fall bite indicator, fall bite tone, retractable illuminated snag ears. 100 % waterproof. The receiver is equipped with a Last Bite/Memory function, silent mode, vibration mode, run and fall bite LED and night light.Requires 2 AAA 1.5 V batteries each (please order separately).