1. Based on ESP32-S3 microcontroller, built-in Xtensa 32-bit LX7 dual-core processor, main frequency up to 240MHz 2. Integrated 2.4GHz Wi-Fi and low-power Bluetooth (Bluetooth LE) dual-mode wireless communication, with excellent performance 3. Adopt high-quality relays, allowing access to loads: 10A 250V AC or 10A 30V DC 4. The switch input has bidirectional optocoupler isolation, supports passive and active switch input, and the relay supports switch input linkage mode control 5. Onboard isolated RS485 interface, convenient for external expansion to RS485Modbus industrial expansion modules or sensors Onboard pin header interface, allowing access to other devices Onboard USB Type-C interface, which can be used for power supply and download debugging, convenient for development and use Onboard terminal power supply interface, supports 7V-36V wide voltage range power supply, convenient for industrial power supply use Onboard Micro-SD card slot, external SD card can be connected to store pictures or files Microcontroller: ESP32-S3 (ESP32-S3-WROOM-1U-N16R8 module by default) Wireless communication: 2.4GHz Wi-Fi (802.11 b/g), Bluetooth 5, BLE Interface: USB Type-C Power supply voltage: 5V Interface type: RS485 Number of input channels: 8 Input voltage range: 5V-36V (The product appearance and printed words depending on the batch, but this does not affect use) Specification: A Color: As shown Material: ABS Package Contents: 1 x Wi-Fi Network Relay 1 x Antenna 1 x Screwdriver 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.