USB To UART/I2C/SPI/JTAG Converter, easy to control and debug various interface devices via PC, Supports USB to 2-ch UART, or USB to 1-ch UART + 1-ch I2C + 1-ch SPI, or USB to 1-ch UART + 1-ch JTAG Supports 2-ch high-speed UART interfaces, up to 9Mbps baud rate, with CTS and RTS hardware automatic flow control. Supports 1-ch I2C interface, for easy operating EEPROM through the host computer or programming I2C devices such as OLED and sensor. Supports 1-ch SPI interface, with 2x chip select signal pins, capable of controlling 2-ch SPI slave devices at different times. Supports 1-ch JTAG interface, can be used with for OpenOCD for debugging and testing (Due to the limited testing of chips and software functions, users need to evaluate and test this function on their own) Onboard resettable fuse and ESD protection circuit, provides over-current/over-voltage proof, safe and stable communication. Supports for Windows 11 / 10 / 8.1 / 8 / 7, Linux, etc. Application Environments: suitable for college students, technical engineers, electronic enthusiasts, or DIY makers for learning and debugging Material: Metal colour: Black Package Contents: 1 x USB To UART Adapter 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.