1. 3.5 inch color screen, maximum resolution 320x480, support 262K color (RGB666), display rich colors. 2. Rich interface, easy to connect a variety of peripherals (I2C, SPI, UART and other peripherals). 3. Support external speakers to play audio. 4. Comes with RGB three-color indicator, indicating rich status. 5. It comes with resistive touch screen to facilitate man-machine interaction. Standard TYPE-C interface for easy program download and power supply. Comes with micro-TF card slot for easy storage expansion. Support external lithium battery, lightweight and portable. Comes with battery charging management circuit to ensure safe battery charging and discharging. Provide rich sample programs for easy learning. Provide the underlying driver technical support,WIKI data online update. Product parameters: Operating voltage: 5.0V Backlight current: 75mA/104mA Combined current: ESP32 reset: 40mA Only the display works: 130mA/160mA Display, speaker, battery charging all work: 480mA/510mA Power consumption: 0.65W/0.8W/0.89W (only the display works) Lithium battery interface charging voltage: Range: 4.2-6.5(V) Charging current: Maximum: 500mA; Module value: 290mA Recommended external battery: 3.7V polymerized lithium battery ESP32 main control parameters: CPU: ESP32-D0WD-V3,Xtensa dual-core 32-bit LX6 microprocessor Main frequency: 240MHz (Max) Storage: 448KB ROM+520KB SRAM+16KB RTC SRAM+4MB external QSPI Flash WIFI: 2.4GHz, 802.11b/g/n mode Bluetooth: Bluetooth V4.2BR /EDR and Bluetooth LE standards Working voltage: DC 3.0-3.6V Operating temperature:-40-85℃ Screen type:TFT Resolution: 3.5 inch: 320xRGBx480(pixels) Active display area: 3.5inch: 48.96(W)x73.44(H)(mm) Colour:As Shown Material:Plastic