Description <br> 1. 3.5 inch color screen, maximum resolution 320x480, support 262K color (RGB666), display rich colors. <br> 2. Rich interface, easy to connect a variety of peripherals (I2C, SPI, UART and other peripherals). <br> 3. Support external speakers to play audio. <br> 4. Comes with RGB three-color indicator, indicating rich status. <br> 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. <br> <br> Support external lithium battery, and portable. <br> Comes with battery charging management circuit to safe battery charging and discharging. <br> Provide rich sample programs for . <br> Provide the underlying driver technical support, data online update. <br> Product parameters: <br> Operating voltage: 5.0V <br> Backlight current: 75mA/104mA <br> Combined current: <br> ESP32 reset: 40mA <br> Only the display works: 130mA/160mA <br> Display, speaker, battery charging all work: 480mA/510mA <br> Power consumption: 0.65W/0.8W/0.89W (only the display works) <br> Lithium battery interface charging voltage: Range: 4.2-6.5(V) <br> Charging current: Maximum: 500mA; Module value: 290mA <br> Recommended external battery: 3.7V polymerized lithium battery <br> ESP32 main control parameters: <br> CPU: ESP32-D0WD-V3,Xtensa dual-core 32-bit LX6 microprocessor <br> Main frequency: 240MHz (Max) <br> Storage: 448KB ROM+520KB +16KB +4MB external QSPI Flash <br> WIFI: 2.4GHz, 802.11b/g mode <br> Bluetooth: Bluetooth V4.2BR / and Bluetooth LE standards <br> Working voltage: DC 3.0-3.6V <br> Operating temperature:-40-85 <br> Screen type:TFT <br> Resolution: <br> 3.5 inch: 320xRGBx480(pixels) <br> Active display area: 3.5inch: 48.96(W)x73.44(H)(mm) <br> Colour:As Shown <br> Material:Plastic <br> <br> <br> Package Contents: <br> 1 * screen <br> 1 * pen <br> 1 * cable <br> 1 * plastic box <br> <br> Only the above package content, other products are not included. <br> 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. <br>