Snger Bite alarm Carp Voice R-4 Reliable Bite alarm set in modern design. 5-stage sensitivity adjustment, 4-stage volume control and 5 different pitches adjustable at the touch of a button, radio box optionally with vibration. With night light and mute function as well as water-repellent, shock-resistant housing. 2.5 mm socket for optical Bite alarm. Incl. carrying case. Bite alarms require 1 x 9V battery, radio box 3 x AAA batteries (please order separately).