Blinder M45 Laser Jammer is a superb laser jammer. It provides 4 laser modules, rather than 3 with the ZR3, and does not plug into the Passport SR7. This is better, since you can shut the laser jammer off separately and not shut the SR7 radar detector off. If you think about it, as your driving down the highway and you get a laser alert, you don't look at the display first; you reach for the brakes first. So the laser display is very nice, but not critical to the objective. The audio alert is the most important, which is what the M45 laser jammer provides.

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