The driver board is compact and is a microcontroller development board equipped with 40PinSPI+RGB interface and 18PinSPI screen interface. It integrates large-capacity Flash and PSRAM, connects to the screen through two screen interfaces, and can smoothly run GUI interface programs such as LVGL. In terms of hardware, it uses the ESP32-S3-WROOM-1-N8R8 module, which is equipped with an Xtensa 32-bit LX7 dual-core processor with a main frequency of up to 240MHz, built-in 512KB SRAM (TCM) and 8MB PSRAM; on-board efficient charge and discharge management chip ETA6096 and MX1.25 lithium battery interface, the pin header interface is compatible with 18Pin SPl screen, and can be compatible with the expansion of various peripheral devices, which is easy to use. In terms of software, you can choose for Arduino-IDE, ESP-IDF and other development environments for development, so that you can easily and quickly get started and apply it to products. The stamp hole design can be directly welded and integrated into the base plate designed by the user. Resolution:480(H)x480(V) Screen chip:ST7701 Touch chip:CST820 Type:B:2.8-inch round touch screen/C:4-inch square touch screen/A:2.1-inch round touch screen Colour:Black Material:PCB Package Contents: 1 * Driver Board 1 * Straight Pin 1 * Touch Screen 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.