Features: The outer layer, sealed without bolt, is made up of sturdy and durable ABS. Sound-light alarm device. Maximum volume up to 80dB It is very sensitive to fish which swallows the bait. Usable with different kinds of rod in different terrain and weather. Power saving. The three batteries equipped can be in use for 1 or 2 years if the power is turned off when in no use. Portable and easily installed No damage to fishing line. 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. Specification: Color: Black Alerts: Audio and Visual Battery:3* AG-13 button cell include Packing content: 1 x Fishing Alarm Brand New in Box 3 x AG-13 Button Cell