Description: [Angle] Real-time measurement of vehicle roll and inclination while driving, the range is -40 deg; ~ + 40 deg;. You can measure the current height of your car. [GPS] GPS satellite positioning, make sure you don't go in the wrong direction. Perfect for traveling and riding adcentures. [Speed] Get the current driving speed, with overspeed alarm function, and also display the local time. Real-time voltage monitoring, can avoid safety hazards caused by too high or too low voltage, extending the battery life. [Fork Used] Suitable for all vehicles, such as trucks, buses, cars, off-road vehicles, SUVs and other vehicles. Specification: Power supply: DC10V ~ 30V; Operating temperature: -40 deg; c ~ + 80 deg; c; Inclination angle: -40 deg; ~ + 40 deg;; Tilt angle: -40 deg; ~ + 40 deg;; Voltage measurement range: DC10V ~ 30V; Voltage measurement accuracy: 0.5V; Speed Accuracy: 0.36 Km/h; GPS data refresh rate: 1s; GPS hot start: 1s (AVG); Wireless transmission frequency: 2.4GHz; GPS cold start: 32s (AVG); Table Size: 12.7cm x 6cm x 2.5cm/5.00 inch x 2.36 inch x 0.98 inch Package Included: 1 x Car HUD 1 x Cigarette Lighter Socket Cable 1 x Refurbished Power Cable 1 x Holder Note: Please allow slightly errors due to manual measurement and different monitors.