Feature 1Stable ESP32 Module: The onboard ESP32-WROOM-32E module with large capacity 4M Byte Flash, supports the use of development tools and provide reference programs in the development environment. 2For Development: The I/O ports and UART program download ports of the ESP32 module are all exported, making it convenient for secondary development. 3Better Design: On board ESP32 module programmable buttons and reset buttons, on board 1 programmable LED and relay indicator light. 4Applicable Scene: On board 8 circuit 5V relay, output switch signal, suitable for controlling loads with working voltage within AC 250V and DC 30V. 5Reliable in Use: The ESP32 8 channel relay development board is equipped with the ESP32-WROOM-32E WiFi and BLE module, and all I/O ports are led out, supporting DC 5-30V power supply. Suitable for ESP32 secondary development learning, smart home wireless control, and other occasion.Item Type: 8 Channel Relay ModuleMaterial: PCBPower Supply: DC 5-30V .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x 8 Channel Relay Module2 x Double 9 Pin Header1 x Single Row 6 Pin Header1 x Jumper Cap