So sick of this wrote:
The manufacturer states that it is inaccurate below speeds of 5 miles per hour. 2 meters per second is 4.47 miles per hour.
I am not disagreeing with you here, but when manufacturers state these kind of things, the logic is tough to follow...
If it is inaccurate below speeds of 5mph (take from this that it IS accurate above 5mph), that is fine, but that would imply that if you receive a reading of say 4.9mph then it is only inaccurate in that it is somewhere between 0 and 5mph then it would be accurate.
Again, I agree these things can be wildly inaccurate, but these sort of claims from the manufacturer are questionable at best.