Review on Heavy-Duty Waterproof Backup Warning Alarm With Super Loud Beeper Tone For Trucks, Vans, Freight Cars, Lorries, And Heavy Vehicles - GAMPRO 12V-80V 107DB (6FD) by Trey Angus

Completely unreliable. We purchased 32 for our fleet of vehicles. Product arrived on Aug 17th and were installed at the beginning of September. It is Sept 29th and 1 out of 3 have stopped working. Return by date was 2 weeks ago so we are basically out the $470 we spent to purchase them. A complete waste.