The Sonik HeroX Bite Alarm Head is a compact, weather-sealed bite alarm designed for reliable indication in all conditions. It features twin high-visibility LEDs, a range of up to 150 metres, and shielded electronics to protect against the elements. The alarm offers forward and backward drop-back indication, plus an intelligent mute mode for quiet fishing sessions. It operates on two AAA batteries, which are not included. - Twin Hi-visibility 5mm LEDs - Eight sensitivity levels - Forward and backward drop back indication - Eight Volume and Tone settings (including silent mode) - Intelligent Mute Mode (I.M.M) - 2.5mm power out socket - Nightglow™ LED function - Up to 150m range - Compact weather sealed case and shielded electronics - Tall integral snag ears and rod friendly rubber inlays - Silent low battery warning - Operates with 2 x AAA batteries (not included)