This is a WiFi relay module based on the ESP8266 serial module. And it controls the relay working status through the app. The perfect kit for controlling all your household appliances with your phone wherever you are.

Function and characteristics:

• ESP8266 WiFi module in AP mode, can be connected by 5 clients at the same time.
• WiFi relay module has two work modes: (1) cell phones carry on the WiFi module directly; (2) cell phone and WiFi module carry on the same router.
• Transmission distance:
• (1) In the open environment, the maximum transmission distance is 400m when the cell phone carry on the WiFi module directly; (2) when the WiFi module and cell phone carrying on the same router ,the transmission distance depend on the router’s signal intensity;
• Onboard 5v, 10 A / 250 v AC 10 A / 30 v DC relay, absorbs 100,000 times continuously; module with diode effusion protection, short response time.

NOTE: The ESP-01 Wifi module is not included with this package..!

How to use: https://www.hackster.io/makerrelay/esp8266-wifi-5v-1-channel-relay-delay-module-iot-smart-home-e8a437