Worked great for the first month or so. After that it started to shake. I've had it for 5 months now and the device has been working flawlessly for various times. After programming with the main unit, it may work normally for an hour, but usually only works for five minutes. For some reason it changes button codes in a seemingly random way, forcing me to either reprogram all functions (very safe to do this while driving, right?) or just stop using it. Buy cheap, get cheap.
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