3-3/8 inch programmable electric speedometer 160 MPH;Resettable Trip odometer;In-dash tachs and speedometers; California Residents: WARNING Tickets are no fun. Calibrating a speedometer is not a great deal of fun either. Auto Meters Electronic Programmable Speedometer makes short work of both, providing an easy to install and easy to calibrate solution that will help keep your speed exactly where it needs to be. Compatible with most factory speed senders, you will wonder why you ever struggled with a speedometer before. Calibration is as simple as a two mile drive, or for even easier operation, Auto Meters GPS Speedometer Sender is a simple plug and play solution for any application.