This unique USB-A to 9-pin Serial Cable is ideal to use with serial devices, which you would want to convert to USB. This USB PDA/Serial Adapter also gives you an outer serial (DB-9 male) Plug-n-Play connection, which can be used with computers, notebooks, and other hand held computing devices that support USB ports. Additionally, the PDA/USB Serial Adapter has a standard type of A USB plug that is compatible with most computer motherboard ports. Aside from a standard type A USB plug, the USB PDA/Serial Adapter also offers PDAs, digital cameras, modems, and ISDN terminal adapters including supreme quality serial connections at a data transfer rate of roughly up to 1 Mbps. saving when suspending and or starting your devices.