GPS Speedometer Sensor Kit monitors your vehicle's driving speed without requiring an adapter and a drawn-out installation process.This GPS speedometer sensor kit features Plug and Play Connectivity that allows for a quick connection to any Speedometer Gauge.The GPS antenna measures 1.5 x 1.5 x 0.5inch with 9.5feet of wire and can be installed anywhere on the vehicle with a clear line of sight to the sky such as the roof, dashboard or on top the trunk. Going through any enclosed areas such as tunnels or garages will obstruct and drop the signal until the antenna regains a clear line of sight to the sky.The GPS signal harness measures 2 x 0.75 x 0.38inch with 3feet of wire that connects the gauge to a 12 volt power source, engine ground source and speedometer signal source.Note: Be sure to set the back of the Speedometer to 3 to acquire the appropriate signal from the GPS Speedometer Adapter.GPS SPEEDOMETER SENSOR KITWhat's Included:GPS Speedometer Sensor KitWaterproof GPS Antenna with 9.5feet of WireGPS Signal Harness with 3feet of WireCompatible with any Speedometer GaugeColour: blackMaterial: plasticPackage Contents:1 x GPS Speedometer Sensor KitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.