Universal wrist-mounted sports speedometer

摘要

A personal wrist-mounted speedometer in the form of a wristwatch component 10 uses GPS signals to calculate the speed of the user. The GPS receiver is housed either within the wristwatch component 10 or externally in a separate unit 12 which may be carried in the hand or pocket of the user. When externally arranged, the GPS receiver uses radio communication to transfer data to the wristwatch component 10, which uses an LCD display screen 19 to display the relevant speed in either numeric 16 or dial 18 formats.