3.5-inch color screen, 320x480 resolution most, large support 262K colors (RGB666), display colorful. Rich interface, easy to connect a variety of peripherals (I2C, SPI, UART and other peripherals). Support external speakers to play audio. Comes with RGB three-color indicator, rich indication status. Comes with a resistive touch screen, convenient for human-computer interaction. Standard TYPE-C interface, convenient for program download and power supply. With micro-TF card slot, easy to expand storage. Support external lithium battery, lightweight and portable. Comes with a battery charge management circuit, which can ensure the safe charging and discharging of the battery. Provide technical support for the underlying driver, WIKI data updated online. Module aging test multiple testing up to military-grade standards to support long-term stability. ESP32 main control parameters: CPU: ESP32-D0WD-V3, Xtensa dual-core 32-bit LX6 microprocessor. Main Frequency: 240MHz (max). Memory: 448KB ROM+520KB SRAM+16KB RTC SRAM+4MB external QSPI Flash. WIFI: 2.4GHz, 802.11b/g/n mode. Bt: Bt V4.2 BR/EDR and Bt LE standards. Operating Voltage: DC 3.0-3.6V. Operating temperature: -40-85°C When display, speaker and battery charging are all working: 510mA. Power consumption: 0.89W (only display working). Lithium interface charging voltage: range: 4.2-6.5(V); typical value: 5V. Charging current: Maximum value: 500mA; module actual value: 290mA. Recommended external battery specification: 3.7V polymerized lithium battery. Parameter: Operating voltage: 5.0V Backlight current: 104mA Total Current ESP32 reset: 40mA Display only: 160mA Liquid crystal screen parameters: Screen Size: 3.5inch Screen Type: TN TFT Resolution: 320xRGBx480(pixels) Effective display area: 48.96(W)x73.44(H)(mm) Number of colors: Maximum: 26