[quote=Deepsees]I use a Garmin Fore Trex 101. It wears on the wrist and has large numbers in the speed window... does not require a hand to hold it. It has lots of functions for basic route displays. I have checked it's speed sensing ability with my car and found it to be within 1 mph accurate. You will notice a slight delay in sudden speed readings... a second or so. It keeps track of speed, elevation, average speed, distance, GPS locations.... way points... etc.
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