Atach Digital GPS Speedometer Gauge 3-3/8'' (85mm)

This GPS Speedometer gauge is the perfect and inexpensive solution to monitor the speed of your car, boat, motorcycle or any of your powersports vehicule. It's sold as a kit, so you don't need to purchase any other parts to get it working. Since this GPS speedometer has it own antenna, it doesn't require any calibration, which make it's installation very easy. In addtion of speed monitoring, this gauge also include compass and odometer functions. It fits in any hole of 85mm (3-3/8''). The gauge is completly shock proof and water proof.