Sucks, big time, I hate buying devices that just don't work at all

I bought this device for my car and used it for about 2 weeks and it worked fine.

I really wanted to like this item, but with the loud beep, it is hard to recommend this device.

This device works perfectly

Great little device.

Defected device, when regular speedometer displays 15 MPH, the device is erratic and not reliable.

Tested in another car to see how accurate the device was and it seemed to be agreeing with the speedometer in the car