Specifications:Features:- Sound-light alarm device- Portable and easily installed- The outer layer, sealed without bolt, is made up of sturdy and durable ABS- 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- No damage to fishing line. it is very sensitive to fish which swallows the bait- This LED light alert is the ideal indicator for night fishingMaterial: PlasticColor: BlackBattery: 3 x LR44/AG13 button cellProduct Weight : 44 G / 1.55 OuncesProduct Dimensions (L*W*H) : 77*55*40 MM / 3.03*2.17*1.57 InchesPackage Weight : 176 G / 6.21 OuncesPackage Dimensions (L*W*H) : 110*110*80 MM / 4.33*4.33*3.15 InchesRetail Packaging: Yes, General BoxPackage Include:4 x Fish Bite Alarm4 x Anti-slip Mat12 x LR44 Button Battery