Features: Display:Speed clock compass travel time travel distance number of satellites altitude 100km acceleration time. Precise Satellite Positioning: The satellite collects the altitude and is not affected by natural factors such as weather so the positioning accuracy is very high. USB Power Supply: With USB power supply the power is completely cut off when the vehicle is turned off. The power is turned on and off automatically and there is no electricity wasting. GPS + Beidou Chip: GPS + Beidou dual-mode chip with high refresh rate of 10 Hz is adopted with a refresh rate of 10 frames per second which can refresh the vehicle speed quickly and without delay. Wide Applications: Suitable forNew energy vehicles trucks fuel vehicles buses automobiles that has USB (5V) port. Specifications: Material:ABS+PC Size: 168*43mm Package Included: 1 * Car Head Up Display 1 * USB Cable 1 *Anti-skidDouble Sided Pasting 1 * User Manual Notes: Please note that due to the influence of light and screen slight chromatic aberration is acceptable. Please allow slight measurement error due to manual measurement. includes: 1 * Car Head Up Display 1 * USB Cable 1 *Anti-skid Double Sided Pasting 1 * User Manual "