Description <br> Onboard mature and stable ESP32-WROOM-32E module, large capacity 4M BYTE FLASH <br> The I/O port and UART program download port of the ESP32 module are all led out to facilitate secondary development <br> Onboard AC-DC switching power supply module, power supply mode supports AC90-250V <br> Onboard ESP32 module RST reset button and IO0 programmable button <br> ESP32 supports the use of for ARDUINO IDE development tools, providing reference programs under for ARDUINO development environment <br> <br> Power supply port: 90-250V AC <br> MCU: ESP32-WROOM (SMD) <br> Material: PCB <br> Color: blue <br> <br> Package Contents: <br> 1 x Relay Module <br> 2 x 10P Double-row Pins <br> 1 x 6P Single-row Pin <br> <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. <br>