SODIAL PL2303HX USB To RS232 TTL Auto Converter Adapter Module For arduino W/ Cables USB 1.0 and USB 2.0 500mA self recovery fuse for protection Reserve 3.3V and 5V pin interface,easy for the DDWRT of different voltage system that need power Adopt imported controller PL2303HX,which can stabilize the flash with high speed Support WINME,WIN2000,WINXP,VISTA,WIN7 systerm