FTDI FT232R chipset. More stronger and more reliable. Real USB 2.0 specification compliant. TIA/EIA RS-485/RS-422 standard compliant. Support baud rate from 300bps to 912.6Kbps. 256 byte receive buffer and 126 byte transmit buffer. FIFO receive and transmit buffers for high data throughput. Transmit distance reach up to 1219m. (The longer distance, the lower rate.) Supports multiple terminals up to 32 RS-485 or RS-422 devices. Supports automatic handshake mode. Supports remote wake up and power management. Auto sense serial signal rate. Zero delay automatic transmit. 600W surge and 15KV static electricity protection. Standard USB type A male and RS-485/RS-422 serial 9 pin male connector with terminal board. Total length: 1.5M. Ideal connections to Modem, PDA, GPS, Bar Code, Digitizer, Digital Camera, Label printer & ISDN terminal adapter, etc. Supports Windows 98/ME/XP/Server 2003/Vista/WIN7/Server 2008, Linux, Mac OS 8 or above & WinCE 4.2 or above. Note: The USB side must be connected to PC or Mac. Other USB devices like digital camera, scanner and printer is not allowed. Package Content: 1X USB 2.0 to RS-485/RS-422 Adapter Cable 1X 5 pin Terminal Board 1X CD Driver