With the ESP8266-01S relay set you have everything in one module to control a relay via WLan. The powerful ESP-01S with 1 MB memory and 80 MHz CPU clock enables independent execution, even in more complex applications, and can be easily integrated into the PCB antenna with a range of up to 300 m either directly in AP mode or integrated into your own Smart Home. Specifications: ✓? Mains current control via WLAN 802.11 b/g/n provides strong and stable connection ✓? The module is convenient to use and can be switched with only one GPIO pin ✓? Supply voltage: 5V ✓? Various open source firmware available Package: 3 x ESP8266 ESP-01S Module 3 relay adapter ESP8266

✓Package Includes: 3 Set ESP8266 Transceiver + Relay Switch Board. ✓Light weight, compact size and very easy to install in a small case. ✓With this smart relay, you will easy to DIY your smart switch to control any device by your phone anywhere.Providing APP and LUA source programs. It can be controlled remotely. ✓Designed for smart home,internet and other DIY projects. ✓Based on ESP-01S WIFI module.