Demanding bite alarm with practical rotary knobs at a great price. With completely sealed electronics. Thus, the bite alarm is excellent water-proof. Features: Separate battery compartment, adjustable volume with integrated on / off switch, volume can be reduced to "zero", adjustable pitch, combined LED light serves as a bite interval display and as operating indicator / 20 sec. High-performance loudspeaker, with soft touch finish sounder box connection, connection for 9V battery.