Overview Highlights This is a wireless doorbell,but no more battery needed or worry battery runs out ! By pressing the push button,it converts kinetic energy into an electrical signal to ring your wireless doorbells. S Do not need any battery or power line to charge the transmitter,and it transforms its own mechanical energy to electrical energy by pressing the button on it. Do not need any wire for installation,e Transmitter can be used in both high-temperature and low-temperature environment,is made of ABS plastic,durable to use. Waterproof transmitter:Can stand against heavy rain. Receiver is made of ABS plastic,inflaming retarding and environmental protection. Key Attributes Dimensions (Length x Width x Height) 10cm x 5cm x 2cm weight 0.05kg Stock Location Country of Origin Brand SUNSKY Shipment Information Weight per item 0.05 kg Dimensions per item (LWH) 10 x 5 x 2 cm Carton weight 0.32 kg Carton dimensions (LWH) 22 x 17 x 5 cm Pieces per carton 3 Stock location