Adding the jammer stuff too? Subd. 12. Radar jammer. For purposes of this section, "radar jammer" means any instrument, device, or equipment designed or intended for use with a vehicle or otherwise to jam or interfere in any manner with a speed-measuring device operated by a peace officer. No person shall sell, offer for sale, use, or possess any radar jammer in this state. https://www.revisor.mn.gov/bin/getpub.php?type=s&year=2007&num=169.14
I have one and I have NEVER!! been hasseled about it and it has saved me from about 2-3 100+ mph tickets and quite a few of 80 or so. Worth every single penny if you ask me I had Soundwaves in Ramsey install mine