The passport 8500 can pick light up like 1/2 mile down the road
Laser guns have a max range of around 3000 feet. A good detector can pick up laser from beyond that. The problem is, laser is a tiny dot, which the officer will aim at your front license plate or headlight reflector. If he is good and steady your detector will never pick it up. Your only chance against a laser gun is 1) laser shifters mounted adjacent to your plate, 2) catching a glint off another vehicle, or 3) a rookie cop who can't aim worth a damn.