This universal speed sensor for axle or driveshaft mounting is designed for use specifically with AutoMeter electric programmable speedometers, providing a 4 pulse per revolution, 12v square wave signal and is a great problem solver for applications requiring driven wheel speed where conventional gearbox speed sensor mountings aren't possible. See instructions for installation details.\nIncludes 4 magnets, sensor pickup, and universal bracket\nACCESSORIES