USB 2.0 to RS232 Convertor, Usb 2.0 to 9pin rs232 serial adapter Support 1.8v,2.5v,3.3v,5.0v USB specification 2.0 compliantSupports full speed high speedUSB 1.1 and USB 2.0 compatibleSupports RS232 serial interface DB9Supports over 3Mbps data transfer rateSupports remote wake-up and power managementSupport 1.8V, 2.5V, 3.3V, 5.0V USB 2.0 to RS232 Convertor,USB DB9 serial adapter,db9 converter