Based on the ESP32-S3 microcontroller, it is equipped with an Xtensa 32-bit LX7 dual-core processor with a main frequency of up to 240MHz. Integrated 2.4GHz WiFi and Bluetooth LE dual-mode wireless communication, with superior radio frequency performance Use high-quality relays to allow access to loads: less than equal 10A 250V AC or less than equal 10A 30V DC The onboard isolated RS485 interface facilitates external expansion and access to various RS485 Modbus industrial expansion modules or sensors. The onboard Pico compatible interface can be adapted to some for Raspberry Pi Pico expansion boards to facilitate the expansion of RTCI/CAN/RS232/LoRa/sensor and other functions. Onboard USB Type-C interface can be used for power supply and download debugging, convenient for development and use There is a terminal block power supply interface on the board, which supports a wide voltage range of 7-36V, making it convenient for industrial power supply. Onboard optocoupler isolation prevents the relay from being connected to an external high-voltage circuit from interfering with the control chip Onboard digital isolation to prevent external signals from interfering with the control chip Onboard integrated power isolation provides stable isolation voltage and no additional power supply is required at the isolation end. Onboard buzzer, RGB lights, and power and RS485 transceiver indicators make it easy to sense the operating status of the device Rail-type ABS protective shell, easy to install and use, safer with shell Due to different batches, the appearance, color and printed words of the product may vary, which will not affect the use. Colour:Black Material:ABS Package Contents: 2 x ESP32-S3-Relay-6CH 2 x Antenna 2.4G 4DB SMA inner pin 2 x Screwdriver