i have a hot wheels radar gun only paid 10 dollars for it. I guess it works alright. I have only used it a couple of times and i was not really using someone eles was while i drove my jato. We did get it to read 60 mph for my jato. Also i think one of the spektrum radios have a aviable speed sensor on the controller for only 20 for the sensor. But the radio is like 300 or something.