Feature 1 ESP32 Development Board: Onboard mature and stable ESP32 module, with large capacity 4M Byte Flash, reliable for use. 2 Convenient Development: The IO port and the UART program download port are all led out, convenient for secondary development. 3 Programmable and Resettable: Onboard ESP32 module IO0 has programmable button and reset button, convenient for operation. 4 4 Way 5V Relay: 4 way 5V relay onboard outputs switch signal, suitable for controlling the load whose working voltage is within AC250V DC30V. 5 Multi Usage: Equipped with WiFi and BLE modules, supports DC560V power supply, can be used for secondary development and learning, smart house wireless control, etc.Item Type: ESP32 Development BoardMaterial: PCB Package List1 x ESP32 Development Board2 x 10 Double Row PIN1 x 6 Single Row PIN1 x Single Line Cap