This alarm presentation set contains three alarms and a wireless bite alarm receiver, plus three bright green bite indicators. The KBI alarms are compact, rugged and reliable. Featuring a sensitive roller wheel and a bright LED, it\'s a fantastic choice for all forms of specimen angling. The speaker features adjustable volume, while the LED boasts a 10 second alert feature. The receiver boasts a long wireless range, on/off switch and volume control. When used in conjunction with the alarm heads, it\'s a top-quality combination that\'s not going to let you down. Includes 3 x bright green bite indicators Adjustable volume Vibrating function on receiver 5mm LED Compact design 10 second latching LED Adjustable locking nut and compression washer Water guarded speaker High output speaker Sensitive bite indication Battery powered by a 9V battery (not included) Receiver powered by 3 x AAA batteries (not included)