Features: It has automatic download firmware, serial communication, JTAG online debugging and other functions. Thesefunctions are available for the ESP8266 and ESP32 platforms. The JTAG in-circuit debugging feature is available for the ESP32 platform. It is easy to use and can be connected to a computer with only one USB cable. Cables can be used to connect to the user board. The connectors are available in 2.54 mm and 1.27 mm pitch packages with a foolproof design. The user board is required to place the Program (6-Pin) and JTAG (10-Pin) connectors in the corresponding order. Considering that the power supply voltage of different user boards may be different, the two interfaces of ESP-Prog can select 5V or 3.3V power supply through Pin Header, which has strong power compatibility. Interface: program, JTAG Fitment: for ESP8266 ESP32 size:73.4 x 25.1 mm Material:ABS colour:black Package Contents: 1 * Program Downloader Only the above package content, other products are not included. Note: Light 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.