Description: ESP32 Development Board: Features a stable ESP32-WROOM-32E module and 4M byte flash for easy secondary development. Supports DC5V/7-30V power supply WIFI Bluetooth BLE 8-channel Relay: Equipped with 100 programmable buttons and a reset button for ESP32 module control. for smart home wireless applications ESP32-WROOM Secondary Development Board: Designed with 8 5V relays, 1 programmable LED, and relay indicator for efficient control. for ESP32 secondary learning DC5-30V Power Supply ESP32 WIFI Bluetooth BLE 8-channel Relay: Provides reference programs in a development environment. Supports DC power supply voltage for versatile use Suitable For ESP32 Secondary Development Learning: for DIY enthusiasts and tech learners. Offers stable performance for various occasions. Easy to integrate and program Specification: Color: As Shown. Material: PCB. Size: Approx 14.8*8*1.5CM/5.83*3.15*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* ESP32 WIFI Bluetooth BLE 8-way relay module 2* 10 double-row PIN 1* 6 single-row PIN