Onboard OV2640 camera and digital microphone, support image recognition and voice processing     On-board 40 PIN GPIO interface, can be connected to Raspberry Pi HAT module to adapt to various IoT applications On-board lithium battery charging boost chip, supporting battery charging and discharging and USB power supply     Compatible with Arduino and ESP-DF software SDK, seamless connection to ESP-WHO application Onboard 8 MB PSRAM, 4 MB FLASH memory, support SD expansion at the same time     Onboard USB to UART chip CP2102, convenient for serial port debugging and download     Onboard 4 LED indicators, easy to check the operating status of the module Provide a complete supporting information manual          WiFi Standard: 802.11b/g/n     Bluetooth standard: Bluetooth 4., 2, including traditional Bluetooth (BR/EDR) and Bluetooth low energy (BLE)     Processor: Xtensa LX6 dual-core processor @240MHz     Camera: OV2640 (UXGA1622x1200)     SRAM: 520KB+8MB     Flash: 448KB + 4MB     Input voltage: 3.3V-5V     Working voltage: 3.3V     Charging current: 1A@5V     The whole machine consumes 7.7mA@5V (ESP32 deep sleep)     Product size 65mmx30.5mm     Working temperature -40Celsius~85Celsius     Colour:blue     Material:abs+metal     Size: 65mm x 30.5mm           Package Contents:     1 x ESP32 development board     1 x OV2640 camera     1 x usb cable          Only the above package content, other products are not included.     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 is +/- 1-3cm.