SG Plug Intelligent Wireless Home Doorbell Outdoor Waterproof Door Bell 300M Remote Water Resistance Door Bells CNY Gift Present

Self Powered Model Transmitter no need to change batteryReceiver need to plug in power socket (SG plug)Color: black / whiteVariation: 1 transmitter & 1 receiverTwo sets can be combined to be Regular Model Transmitter needs to change batteries when it becomes flatReceiver needs to plug in power socket (SG plug)Color: blackVariation: 1 transmitter & 1 receiver; 1 transmitter & 2 receivers USB Model Transmitter needs to change batteries when it becomes flatReceiver is USB. Plug and playColor: whiteVariation: 1 transmitter & 1 receiverDescription Self Powered Model Regular Model USB Model