Support 4 kinds of TTL levels:This is a versatile USB to TTL converter. It is powerful enough to handle almost all TTL level communications. It is compatible with 5V, 3.3V, 2.5V, 1.8V TTL levels. | FTDI FT232RNL Chip:Built-in original FTDI FT232RNL Chip.Industrial grade, Compatible with Windows 7, 8, 10, 11, Linux, MacOS | Protective case:Comes with a protective case, this transparent protective case can effectively prevent static interference from the hand and prevent accidental short circuit | It provides access not only to UART TX,RX, RTS, CTS, VCC and GND pins,but also provides access to DSR,RI,DCD,DTR,RESET pins | What You Get: SH-U09C5 USB to UART Adatper, 6PIN Cable