1. Onboard and stable ESP32-WROOM-32E module, large-capacity 4M Flash;<br> 2. The I/O port and UART program download port of ESP32 module are all led out, which is convenient for secondary development;<br> 3. power supply voltage DC5V/7-30V;<br> 4. Onboard ESP32 module IO0 programmable button and reset button;<br> 5. ESP32 supports the use of for IDE development tools, and provides reference programs in the for development environment<br> Product selling point<br> 1: Wide range of applications<br> 2: Simple to use<br> 3: Small size<br> 4: stable performance<br> 5: Long service life<br> :<br> ESP32 eight-way relay development board is equipped with ESP32-WROOM-32E WiFi&BLE module, all I/O ports are led out, and supports DC5-30V power supply mode. It is suitable for ESP32 secondary development and learning, smart home wireless control and other occasions.<br> Onboard 8-way 5V relay, output switch signal, suitable for controlling loads with working voltage within AC 250V/DC30V.<br> 1 programmable LED and relay indicator onboard.<br> Colour:As Shown<br> Material:Plastic+Metal<br> Package Contents:<br> 1 * Relay<br> Only the above package content, other products are not included.<br> 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.