The development board adopts a 1.28-inch circular TFT screen, GC9A01 driver chip, 240 * 240 resolution, and a clearer 65K color display. The screen is connected to the onboard ESP32 using an SP interface, providing driver examples to make usage easier. The development board provides a USB port for one click download of programs or serial communication. Of course, the USB port can also be used for power supply. The board also contains a battery interface and charging circuit. If a 3.7V lithium battery is connected, only the USB port is needed for charging. For the battery's power, the battery is connected to port 0 of ESP32 through two voltage divider resistors. The voltage of the battery can be determined by collecting the voltage after voltage divider through ADC to reduce default power consumption, Enable the function after short circuiting the jumper pad. In addition, there are three side pressed buttons and TF card interfaces on the board that can be directly inserted into the TF card for use. One button is a power switch button, and the other two are user-defined buttons that can be coded according to your own needs for use. If you think the buttons are too small to fit into your own shell, you can also weld wires on the pads on both sides of the buttons to connect to external buttons for use. Parameter: Input voltage: USB-5V/3 7V-BAT (battery only supports calibration 3. 7V lithium battery) Working current: It is related to the operation of the code and generally does not exceed 100ma ESP32 Minimum System Parameters Operating frequency: 240MHZ Number of cores: 2 FIash size: 16Mbyte Psram: 8Mbyte (the current version of ESP32 only supports the use of 4Mbyte space) Antenna: Yes Wireless: Bluetooth+WiFi 2 4G Screen type: TFT IPS Peripheral: TF card holder x1 User defined keysx2 1.28-inch GC9A01 driver chip TFT screen x1 Electricity collection interface x1 Colour:black Material:PCB+LCD screen Package Contents: 1 x ESP32-TFT Development Board(Not equipped with TF card) 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.