Based on ESP32-S3 MCU, it is equipped with Xtensa 32-bit LX7 dual-core processor with a main frequency of up to 240MHz Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication, with excellent RF performance The switch input has bidirectional optocoupler isolation, supports passive and active switch input, and the relay supports switch input linkage mode control Onboard USB Type-C interface, can be used for power supply and download debugging, convenient for development and use Onboard RTC clock chip, supports timing tasks microcontroller:ESP32-S3(The default is ESP32-S3-WROOM-1U-N16R8 module, which can be customized) wireless communication:2.4GHz Wi-Fi (802.11 b/g/n),Bluetooth 5,BLE Interface form:USB Type-C Supply voltage:5V Function:Device power supply, USB communication, firmware download, etc (The product appearance and printed words may vary depending on the batch, but this does not affect use) Color:As Shown Material:ABS Package Contents: 2 x Wi-Fi Network Relay Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.