Features 1、Display the maximum speed, high‑speed alarm, odometer, voltage (vehicle battery) and time. 2、With GPS satellite positioning, which can measure the maximum speed and display the current speed. The top speed is 620 miles per hour or 999 kilometers per hour. 3、High‑speed/low‑speed alarm can be set. When the speed exceeds the set value, the LED will flash to alarm. 4、The switching unit can be set to mile/hour, nautical mile/hour or kilometers/hour. 5、Powerful internal antenna. GPS will automatically locate UTC or the user can set the time manually. 6、This digital meter is great for automotive, truck, ATV/UTV, motorcycle or marine applications. 7、Easy to install, no external antenna is required, just connect 10‑24V DC. Fits 2.36in standard dashboard hole. Specification Condition: 100% Brand New Item Type: GPS Speedometer Odometer Material: ABS Shell Color: Black Light Color: Blue Voltage: DC10-24V Measurement Accuracy: 0.001 Speedometer Refresh Rate: 0.2 Seconds Fitment: For Auto, Truck, ATV/UTV, Motorcycle Or Marine, etc. Diameter: Approx. 60mm / 2.36in Package List 1 x GPS Speedometer 1 x Bracket 1 x Mounting Harness 2 x Nuts 1 x Manual