Description: Stable and Reliable: Equipped with the mature and stable ESP32-WROOM-32E module, this development board boasts a 4M byte flash capacity for reliable performance Easy to Develop: The ESP32 module I/O port and UART program download port are conveniently brought out for easy secondary development. for beginners and experienced developers alike Convenient : This board features a programmable button and reset button for easy , as well as 4 5V relays for output switch signals. Includes a programmable LED and relay indicator light for added Versatile Compatibility: Suitable for ESP32 secondary development learning, this board is compatible with a wide range of applications and projects. for students, hobbyists, and professionals alike Efficient Performance: The ESP32-WROOM development board offers efficient performance and reliable connectivity, making it for a variety of IoT and DIY projects. your creativity with this versatile and reliable development board Specification: Color: green. Material: PCB. Size: Approx 9.3*8.7*1.5CM/3.66*3.43*0.59inch. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1* Four-way relay module