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Cheap Rangefinder How does a rangefinder work? Effectively, ok, of course the techie foundation is derived from military reasons. Basically a laser beam is definitely shot from the device and upon hitting an object it really is being reflected. The device and then measures the time it took for any beam to come back to the unit. The device then puts the moment and the velocity of the lazer into a formula and spits out the distance the stream travelled. http://golfrangefinderdeals.com/why-you-need-a-rangefinder

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