Rangefinders, I heard it was illegal to use hand held rangefinders for big game. Is this true?

I was thinking about buying a hand held rangefinder. Due to the cost of one, I wanted to confirm if they are legal for big game or not.
Answer: 
Rangefinders are legal to hunt big game in Idaho with, as long as the rangefinder is not attached to a weapon (e.g. rifle, bow).
Answered on: 
Monday, March 17, 2014 - 8:54 AM MDT