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 colors2.Rich interfaces, convenient for connecting various peripherals (I2C, SPI, UART, etc.)3. Support external speakers to play audio4. Comes with RGB three color indicator lights, providing rich indication status5. Standard TYPE-C interface, convenient for program download and power supply6. Comes with a micro TF card slot for easy expansion of storage7. Supports external lithium batteries, lightweight and portable8. Comes with a battery charging management circuit to ensure safe charging and discharging of the batteryNOTE: Not Support Touch.ESP32 parameters:Module: ESP32-32ECPU: ESP32-D0WD-V3, Xtensa dual core 32-bit LX6 microprocessorMain frequency: 240MHz (maximum)Storage: 448KB ROM+520KB SRAM+16KB RTC SRAM+4MB external QSPI FlashWIFI: 2.4GHz, 802.11b/g/n modeBluetooth: Bluetooth V4.2 BR/EDR and Bluetooth LE standardsWorking voltage: 3.0~3.6 (V)Working temperature: -40~85 (℃)Electrical parameters:Working voltage: 5.0VBacklight current: 104mATotal current SP32 reset: 40mAWhen only the display screen is working: 230mAWhen the display screen, speaker, and battery charging are all working: 580mAPower consumption: 1.15W (only the display screen works)Brightness: with touch screen: 370 cd/m2; No touch screen: 470 cd/m2Lithium battery interface charging voltage range: 4.2~6.5 (V)Typical value: 5VCharging current: maximum value: 500mAModule actual value: 290mASuggested external battery specification: 3.7V lithium polymer batterySpeaker interface parameters (maximum): 1.5W (8 Ω) or 2W (4 Ω)Color: YellowMaterial: PCB+PlasticPackage Contents:1 * Development Board1 * DuPont Line1 * data cableOnly 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