Ommunication Interface: Wireless Power: Dry battery Alarm: No Item Type: Wireless Doorbell Notice: Waterproof rain cover (do not include doorbell) Waterproof cover installation method: Method 1. In the market to buy AB glue (or glass glue), according to the use of glue to the bottom of the uniform coating of glue, the edge of the waterproof cover and the wall evenly paste, Hand pressed for a few minutes to firmly paste (glass glue It takes about 30 minutes). Installation method is simple and fast! Method 2. Using screws to fix rain cover Colour:Transparent color Material:ABS Package Contents: 1* doorbell rain cover Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks