Dual Channel WiFi Relay 12V ESP8266 WiFi Relay Module Phone APP Remote Switch for IOT Smart Home Item Type: Dual Channel WiFi Relay Main Parameter: 1. Onboard ESP-01 WiFi module and high performance microprocessor. 2. The module has 2 working modes: Mode 1: The phone is directly installed on the WiFi module. Mode 2: Equipped with a mobile phone and WiFi module on the router Additional Features: It can also be used as a USB relay when the ESP-01 is pulled out. 3. Transmission Distance: In an open environment, when the mobile phone is installed on the WiFi module, the maximum stable transmission distance is 100M. When the WiFi module and the mobile phone are simultaneously carried on the router, the transmission distance depends on the signal strength of the router. 4. Use Smartcongig technology to complete the account and password configuration on the APP ESP-01 WiFi module on the mobile phone, and configure the username and password memory functions. 5. Onboard 10A 250V AC, 10A 30V DC relay, which can continuously pull 100,000 times, with diode discharge protection and short response time. 6. Board mode selection and real time working status indicator. 7. Reserved UART debug interface and MCU program download interface.