Ideal for programmers, hardware engineers and DIY User.<br> Compared to other USB to TTL UART adapters, this adapter not only supports 3.3V and 5V logic levels, but also adds support for 1.8V logic levels.<br> At the same time it is equipped with a protective plastic case, this protective plastic case can effectively prevent static interference and various short <br> <br> circuits.<br> <br> <br> <b>Specification:</b><br> Model: SH-U09C2<br> Main chip: FTDI FT232RL<br> Pin Definition: CTS,RTS,RXD,TXD,GND,VCC<br> Output VCC: 1.8V/3.3V/5V<br> TTL Level: 1.8V/3.3V/5V <br> USB interface: 2.0<br> The maximum speed: 3Mbps<br> <br> <b>About indicator LED:</b><br> PWM LED:Power Indicator<br> RXD LED:The data transmission indicator flashes when there is data from the USB port.<br> TXD LED:The data receiving indicator flashes when the USB port receives data.<br> <br> <b>List of supported systems</b><br> 1,Windows xp,7,8,10 <br> 2,Ubuntu 11.10, kernel 3.0.0-19<br> 3,Mac OS X 10.3 to 10.8 (32 &64 bit)<br> 4,Mac OS X 10.9 and above(64 bit)<br> You can download the driver directly from FTDI's website<br> <br> <b>Packing list:</b><br> 1 X FTDI FT232RL USB to TTL Adapter with a plastic shell<br> 1 X User Manual<br> 1 X 4 PIN DuPont cable<br> <br> <b>WARRANTY:</b><br> DSD TECH offers a 1-year warranty and lifetime technical support for this USB-to-TTL adapter。If you meet any question, Please contact us, We will fix your <br> <br> issue within 24 hours.<br>