Features:Sound-light alarm device. Maximum volume up to 80dBThe outer layer, sealed without bolt, is made up of sturdy and durable ABS.Usable with different kinds of rod in different terrain and weather.The three batteries equipped can be in use for 1 or 2 years if the power is turned off when in no use.No damage to fishing line. it is very sensitive to fish which swallows the bait.Fishing supplies, easy to use, you can use the clamps on the rod, but also prompt light, as long as the fish will pull a sound and light alarm, even anglers fell asleep, light fish bait will prompt tips.Descriptions:Power saving.It is very sensitive to fish which swallows the bait.Portable and easily installed.Specification:Color: BlackAlerts: Audio and VisualBattery:3* AG-13 button cell (include)Original box: NOSize :6*4.5*6cmMaterial:ABSPacking content:1 x Fishing Alarm3 x AG-13 Button Cell