Description: 100% Brand New and High Quality This WIFI relay based on AI-Thinker ESP-01S WIFI module. It is designed for smart home, Internet of thing and other DIY project. With this smart relay, you will easy to DIY your smart switch to control any device by your phone anywhere. Specification: Product size: 37 * 25mm Operating voltage: DC5V Communication: WIFI (ESP8266 module) Transmission distance: the maximum transmission distance of 400m (open environment, mobile phone equipped with WIFI module) Load: 10A/250VAC 10A/30VDC, the relay pull 100,000 times Specifications: Product size: 37 * 25mm Operating voltage: DC5V Communication: WIFI (ESP8266 module) Transmission distance: the maximum transmission distance of 400m (open environment, mobile phone equipped with WIFI module) Load: 10A/250VAC 10A/30VDC, the relay pull 100,000 times Package Included: 1*Relay module 1*ESP-01S