This Korum 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. To pair an alarm to the receiver, follow these instructions. Ensure all alarms, and receiver are turned off. 1. Hold down both buttons on the receiver until it turns on and the red LED illuminates. 2. Turn on relevant alarm and roll roller until it beeps, and the receiver goes to the next colour. 3. To skip colours on the receiver press volume button. 4. Receiver will turn off once last alarm paired.