Our popular RS-232 adapter cable to suit our TS-GPM004, GPM008 and GPM009 universal GPS Receivers which provides RS-232 (COM Port) interface.
The Y-Cable is 25cm in length as some APRS users had asked for a longer cable to suit more laptops etc.
The GPS requires power which it obtains from a USB port, or PS/2 port with a suitable adapter available from any PC shop. No data comm is present on the USB cable, USB is used only for 5v power for the GPS. All data comm occurs on the RS-232 DB9 connector.