Prologic Bite Alarm Set The rod recess is very deep which makes it possible to fish extreme situations without the use of additional snag ears. With 5 sensibility levels and 6 volume levels, ultra bright LEDs, 100 m wireless range, waterproof, adjustable nightlight. The bite alarms operate with 2 x AAA batteries, while the receiver operates with 1 x 9 V battery (please order separately). The BAT+ bite alarm set is available with blue LED or traditional assorted colored LED.