Tuya Zigbee Signal Repeater USB Extender Amplifier For Zigbee Devices Sensors Expand 20-30M Smart Home Gadgets Automation Module Working voltage: 1.8~3.8V Product size: 38.85 * 21.5 * 8.5mm Communication method: Zigbee Specifications: 1.It is a mini smart valve that Tuya develops.It consist of a highly intergrated WI-FI module, low power-consuming Zigbee module, and PCBA. It can be connected to the Tuya smart app for device adding, reset, third-party control, and Zigbee group control, meeting smart home requirements. 2.There sensors and detectors can not work without gateway.Gateway need to connect with WI-FI router, if you already have gateway, you can purchase our Zigbee sensors or detector only. 3.The Zigbee sensor and detector can not work standalone without gateway. 4.If your house too big then zigbee signal can't not cover every corner,then you can use this Zigbee signal repeater. 5.This repeater only can transit zigbee signal. 6.Transit signal strength depends on the actual house. Package Included: 1* Zigbee Extender