ADJUSTABLE SENSITIVITY: These electronic fishing bite alarms are designed to alert you when a fish is hooked. The sensitivity of the fishing alarms can be controlled by adjusting their angle, which helps to exclude the effects of strong currents and wind. When fishing with more than one rod, these are very helpful in knowing which rod is getting a hit. Package includes: 4 x fishing bite alarms, 12 x LR44 button batteries. LOUD AUDIBLE ALARMS: Once a fish bites, the fishing alarm will sound an 80-decibel volume to get your attention. You won't miss a single fish even if you're a hundred meters away or busy with other things. Note: Volume is not adjustable. BRIGHT LED INDICATOR: In addition to the audible alarm, each fishing bite alarm is equipped with a red LED light, which will simultaneously emit a bright light alert when a fish is biting. So no need to worry about not seeing the fish in the dark waters. Just enjoy a leisurely fishing time at night! EASY TO INSTALL: Simply hang the line on the hook of the fishing bite alarm and turn on the switch to get the fishing equipment working. The silicone anti-slip mat on the inside of the clip can prevent the alarm from falling off or moving around effectively. Note: Clip the fishing alarm as far away from the rod tip as possible to make it work properly. WIDE APPLICATIONS: The gap of the fishing bite alarm clip is 0.4in/1cm, it can be used for many different types of rods, except for rods that are too thin. They are suitable for sea fishing, ice fishing, fly fishing, bass fishing, trout fishing, kayak fishing and pier fishing in different terrains. What a great gift option they are for fishing enthusiasts!