1. Comes with ESP32-32E module, easy to develop. 4.0-inch color screen, not support touch, with the highest resolution of 320x480, supporting up to 262K colors (RGB666), displaying rich colors 2.Rich interfaces, convenient for connecting various peripherals (I2C, SPI, UART, etc.) 3. Support external speakers to play audio 4. Comes with RGB three color indicator lights, providing rich indication status 5. Standard TYPE-C interface, convenient for program download and power supply 6. Comes with a micro TF card slot for easy expansion of storage 7. Supports external lithium batteries, lightweight and portable 8. Comes with a battery charging management circuit to ensure safe charging and discharging of the battery NOTE: Not Support Touch. ESP32 parameters: Module: ESP32-32E CPU: ESP32-D0WD-V3, Xtensa dual core 32-bit LX6 microprocessor Main frequency: 240MHz (maximum) Storage: 448KB ROM+520KB SRAM+16KB RTC SRAM+4MB external QSPI Flash WIFI: 2.4GHz, 802.11b/g/n mode Bluetooth: Bluetooth V4.2 BR/EDR and Bluetooth LE standards Working voltage: 3.0~3.6 (V) Working temperature: -40~85 (℃) Electrical parameters: Working voltage: 5.0V Backlight current: 104mA Total current SP32 reset: 40mA When only the display screen is working: 230mA When the display screen, speaker, and battery charging are all working: 580mA Power consumption: 1.15W (only the display screen works) Brightness: with touch screen: 370 cd/m2; No touch screen: 470 cd/m2 Lithium battery interface charging voltage range: 4.2~6.5 (V) Typical value: 5V Charging current: maximum value: 500mA Module actual value: 290mA Suggested external battery specification: 3.7V lithium polymer battery Speaker interface parameters (maximum): 1.5W (8 Ω) or 2W (4 Ω) Color: Yellow Material: PCB+Plastic Package Contents: 1 * Development Board 1 * DuPont Line 1 * data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the pictur