Pete, the Labradar used Doppler radar to sense the bullet's flight toward the target, recording it several times. It calculates the muzzle velocity from those several radar readings, so you can't use it inside a shooting house unless there's a hole in front of the chronograph.
Mule Deer,
i do have 2 windows in front of my cement bench a left and a right both are 10 inch by 14 inches high 2 feet apart would that work ? i shoot out of the right hole . or do you have the phone number for Labradar. i hate to spend $600.00 if it won`t work in my warm dry shooting house .thank you,Pete53
