The Nikon Serial to USB Converter Cable is used to connect your Nikon total station with your PC, when the PC does not have a 9-Pin serial port. This cable uses the USB port on your PC instead.
The Nikon Serial to USB Converter Cable is compatible with the Nikon Nivo M/M+, DTM/NPL-322/322+, DTM/NPL/NPR-302, DTM/NPL-502 and Spectra Focus 6 Series total stations. It uses a USB port connection for transferring measurements and data to your PC.