I was going to post a question asking whether the Blinder is legal in Ontario, Canada but I answered my own question after googling for the highway traffic act. It seems that because the blinder includes a warning system for the driver, it is ipso facto illegal. Even if you disconnect the buzzer and LED, it's still illegal because it's designed to interfere with their measurement activities. All the cops need to do is look at the front of your car through a digital camera and they'll see the Blinder activate.
Speed measuring warning devices
79. (1) In this section,
“speed measuring warning device” means any device or equipment designed or intended for use in a motor vehicle to warn the driver of the presence of speed measuring equipment in the vicinity and includes any device or equipment designed or intended for use in a motor vehicle to interfere with the effective operation of speed measuring equipment. 1996, c. 33, s. 12.
Speed measuring warning device prohibited
(2) No person shall drive on a highway a motor vehicle that is equipped with or that carries or contains a speed measuring warning device. 1996, c. 33, s. 12.