Functions: speed, clock, compass, single mileage, travel time, number of satellites, altitude, 0-100km/h acceleration time Alarm: speeding alarm, fatigue driving alarm Vehicle performance test: The time required to accelerate from 100km/h is an important reference data for vehicle dynamic performance and testing. The time and distance used by the car are from 0KM/h--100KMh. Applicable scene: suitable for all automobiles Display of different functional interfaces Speed + time + compass + number of GPS satellites + atmosphere light Speed + travel time + atmosphere lights Driving direction angular velocity + compass + altitude Speed + travel distance Speed+compass+100km acceleration time+decoration Speed + atmosphere light Speed + Compass + GPS Satellite Number Simple speed Colour:black Material:plastic Package Contents: 1 X HUD 1 X USB Cable 1 X Adhesive Tape 1 X English Manual Only the above package content, other products are not included. Note: Light reflection 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.