Tickets are no fun. Calibrating a speedometer isn?t a great deal of fun either. AutoMeter?s 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?ll wonder why you ever struggled with a speedometer before. Calibration is as simple as a two mile drive, or for even easier operation, AutoMeter?s GPS Speedometer Sender is a simple plug and play solution for any application. 7 color user-selectable background illuminations (red, blue, green, white, yellow, orange, and violet) with adjustable brightness for day and night - with independent dimming of dial and pointer. SPEK-PRO