Tickets are no fun. Calibrating a speedometer isn't a great deal of fun either. Auto Meter's GPS Speedometer Interface is the no fuss solution to complete your speedometer installation. Ideal for off-road applications with large wheel and tire combinations, racing gearboxes, and applications where packaging considerations prevent conventional speed sensor or cable installations. Features Plug and Play with Auto Meter Electronic Programmable Speedometers.. Lightning quick 10 Hz signal update rate is the fastest.. Fully sealed and paintable magnetic micro antenna Dimensions - 1.472 in.x 1.339 in.x 0.508 in. Includes 16 ft. of wiring for plenty of mounting versatility.. GPS module is fully sealed against water and dust. Includes 6.5 ft. wiring harness. Case Dimensions -. One touch calibration process takes only seconds for most other electronic speedometers..