The USB to 1S/2S/4S/8S RS-232C Adapters are designed for PC, thin clent, or server to provide instant COM ports expansion via the Universal Serial Bus (USB). These Adapters provide the scalability to quickly adapt to new USB technologies. Multiple modules can be added to a single USB interface allowing you to add WAN connectivity as needed. Complete product line offer many choices help you to expand and make your network grow with your requirements. With the USB Plug-and-Play feature, simply plug in, follow the instructions of Install Wizard, then you are done. You don¡¦t have to deal with Card Slots, I/O address, IRQ jumpers, DMA and others when you are connecting the devices. The System will recognize the device and install the drivers automatically. The USB to 1S/2S/4S/8S RS-232C Adapters are the ideal solutions for your expanding applications. „Ï Provides 8 Serial Ports over USB Port „Ï Easy Serial Port Expansion over USB Port „Ï Supports Serial Speed up to 1.2Mbps „Ï 256-byte Transmitting and Receiving Buffer „Ï Provides 4 DB9-Male Connectors „Ï USB1.1 and USB2.0 Backward Compatible „Ï Provides Detachable Wall Mounting KIT „Ï DC Jack for Optional DC 5V Power Input „Ï Optional DC 5V over DB9-Male Connector „Ï Supports Windows 98, Me, XP, Win2000,Win2003 Supports 8 DB9-Male UART Serial ports, the key benefits are: „Ï Buffer: 256 bytes „Ï Data Bits: 5, 6, 7, 8,16 „Ï Stop Bits: 1, 1.5, 2 „Ï Parity: None, Odd, Even, Mark, Space „Ï Baud Rate: 75 to 1.2Mbps Power Requirements ƒÜ Normally Power solely from USB Bus, no external power supply needed. ƒÜ A DC Jack Input available for supports Power over DB9-Male applications. Environmental: Operating Temp.: 0 to 55ƒ¨C (32 to 131ƒ¨F) Storage Temp: -20 to 85ƒ¨C (-4 to 185ƒ¨F) Operating Humidity: 5 to 95% RH Form Factor 5.90¡¨(L)x2.61¡¨(W)x1.02¡¨(H) (15.00 x 6.65 x 2.60 cm)