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, and portable. Comes with battery charging management circuit to safe battery charging and discharging. Provide rich sample programs for . Provide the underlying driver technical support, 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 +16KB +4MB external QSPI Flash WIFI: 2.4GHz, 802.11b/g mode Bluetooth: Bluetooth V4.2BR / 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 Package Contents: 1 * screen 1 * pen 1 * cable 1 * plastic box 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.