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. We support the APP and LUA source code. We had upload a demo code in the ESP0-01S, just supply a DC5V power, then you can control it. ********* Product parameters: Adresse : COOPERATIVE IMMOBILIERE -ATTAYARAN EL-MADANI- HAOUCH ATTAR N°2, DAR EL BEIDA، Dar El Beïda 16001 https://www.google.com/maps/dir/36.2853847,2.7680247/smart+dev+dz/@36.46683,9.74z/data=!4m9!4m8!1m1!4e1!1m5!1m1!1s0x128e51c6f51903ab:0xd8fd9a8b9ea492af!2m2!1d3.21342 ********************* 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 x ESP8266 5V WiFi relay module Things smart home remote control switch phone APP ESP-01S relay module