Length: 70-inch Connectors: One USB-A to DB9 Male(BT-DB9) Connectors: One USB-A to DB9 Male and DB25 (BT-DB925) Supports automatic handshake mode Over 1Mbps data transfer rate Supports remote wake-up and power management 96 byte buffer each for upstream and downstream data flow Easy installation Works with cellular phones, PDA, digital cameras, modems, and ISDN terminal adapters Frees your RS-232 ports for other uses No IRQs, no IRQ conflicts Requires Microsoft Windows 98, Me, NT, 2000, XP, Vista, Windows 7 (32 and 64)