This item is unused. It is equipped with an FTDI "FT-232HL" chip. It has a jumper for switching logic levels between 5V and 3.3V. It connects via a USB Mini-B connector and can convert a USB interface to UART (RS232), I2C, SPI, JTAG, parallel interfaces, etc. It includes an overcurrent protection fuse for USB power. Please install the drivers from the FTDI website before use.