1. Onboard digital microphone, support image recognition and voice processing2. The onboard 40 PIN GPIO interface can be connected to the HAT module to adapt to various IoT applications3. Onboard lithium battery charging and boosting chip, supporting battery charging and discharging and USB power supply4. Compatible with and ESP-IDF software , seamlessly connected with ESP-WHO application. Onboard 8 MB 5. PSRAM, 4 MB FLASH memory, and supports SD expansion. Onboard USB to UART chip CP2102, convenient for serial port debugging and downloading6. There are 4 LED indicators on board, which is convenient to check the running status of the moduleWiFi standard: 802.11b/gBluetooth standard: Bluetooth 42, including traditional Bluetooth (BR/) and Bluetooth Low Energy ()Processor: Xtensa LX6 dual-core processor @240MHzSRAM: 520KB+8MBFlash memory: 448KB+4MBInput voltage: 33V-5VWorking voltage: 33VCharging current: 1A@5VMachine current consumption: 7.7mA@5V (ESP32 deep sleep)type:B: without cameraWorking temperature: -40~85CColour:blueMaterial:ABSSize: 6.5 x 3.5cm Package Contents:1 x ESP32One Development Board 1 x USB cable(type A male port to -male port )1 x Screw bagOnly the above package content, other products are not included.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.