Features: Main control chip: support ESP32-DOWDQ6-V3 dual-core 32bit MCU integrated WiFi, Bluetooth-compatible USB driver chip: CH340C, with good system compatibility, higher- download speed, and more stability. Support VIN-external wide voltage- input 5-12V power supply (battery version maximum 5.5V input) Support USB power supply, external 3.3V power supply, and VIN-power supply three kinds of power supply Mode-development board Compatible with-ArduinoIDE mixly, mind+, Python- and other programming software Specifications: Development board model: ESP32-DevKitC-32 Module-model: ESP32-WROOM-32 Main control chip: ESP32-DOWDQ6-V3 dual-core 32bit MCU integrated WiFi, Bluetooth-compatible, Integrated 520-kBSRAM, 448-kBROM16-kBSRAMinRTC External storage: 4MB Size: approx 53.4x68.6mm/2.1x2.7in Weight about 40g Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is1-3cm. Package includes: 1PC Expansion Board