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: 5.0VBacklight current: 75mA/104mACombined current:ESP32 reset: 40mAOnly the display works: 130mA/160mADisplay, speaker, battery charging all work: 480mA/510mAPower 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: 290mARecommended external battery: 3.7V polymerized lithium batteryESP32 main control parameters:CPU: ESP32-D0WD-V3,Xtensa dual-core 32-bit LX6 microprocessorMain frequency: 240MHz (Max)Storage: 448KB ROM+520KB +16KB +4MB external QSPI FlashWIFI: 2.4GHz, 802.11b/g modeBluetooth: Bluetooth V4.2BR / and Bluetooth LE standardsWorking voltage: DC 3.0-3.6VOperating temperature:-40-85Screen type:TFTResolution:3.5 inch: 320xRGBx480(pixels)Active display area: 3.5inch: 48.96(W)x73.44(H)(mm)Colour:As ShownMaterial:PlasticPackage Contents:1 * screen1 * pen1 * cable1 * plastic boxOnly 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.