Function: vehicle speed, satellite time, driving direction, km/h and mph speed unit, automatic photosensitive, sound alarm switch Alarm: speeding alarm, fatigue driving reminder alarm 1. New intelligent GPS vehicle speed and time display: GPS vehicle speed, satellite time, compass, overspeed alarm, driver fatigue reminder 2. Simple function and small appearance3. The compact body is suitable for placement no matter where it is placed, it is clear and natural, and does not block any line of sight. 4. Two-color optional: white light/green light optional, no matter day or night, still clearly visible.5. Speed calibration function: accurate speed display, can be adjusted to be consistent with the speed on the car speedometer (GPS vehicle speed is approved by satellite signals! It is essentially very accurate, and no adjustment is required normally).Specification: Display size: 2.2-inch Material: ABS Product size: 52*52*14mm/2.05*2.05*0.55"'""'" Packing size: 100*75*75mm/3.94*2.95*2.95"'""'" Product weight: 60gGross weight: 135g Applicable scene: suitable for all models Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle, and monitor. Packing list 1 X HUD 1 X USB Cable 1 X Suction Cup Mount 1 X Adhesive 1 X Manual