Category:Electric Bike Horn / Bell; What’s in the box:1 Bike Horn; Activity:Mountain Bike MTB,Road Bike; Quantity:1; Decibel Level:110; Power Supply:Button Battery,Electric; Material:Silica Gel; Width:3; Dimension:3.53; Function:Lightweight,Waterproof; Coat Bust:3.5; Waterproof Level:IPX 4; Brand:ROCKBROS; Shipping Weight:0.060; Net Weight:0.033; Listing Date:07/30/2018