Auto Meter 4881 CARBON FIBER 5" GPS Speedometer (0-140 MPH) Display features: Time/Date, Cumulative Distance (odometer), Trip Distance (tripmeter), GPS Coordinates with Heading Info, Compass, Peak Speed Recall, and Inclinometer These highly accurate GPS Speedometers include an omnidirectional 10 Hz antenna with a 16ft. cable. The dimensions for the antenna are quite small (1.472 in. x 1.339 in. x 0.508 in.) allowing it to be easily hidden Utilizes up to 3 GPS satellites simultaneously and samples 10 times per second for unparalleled accuracy and response Plug and Play, no calibration required 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system