Self-adapting vehicle models are compatible with OBD II or EUOBD (automatic vehicle diagnostic system) plug and play vehicle. Vehicle speed, engine RPM, temperature (voltage/throttle position/ignition angle/100km acceleration time), instantaneous fuel consumption, average fuel consumption, cruising range, low fuel peak, idle peak, engine failure and display at the same time. The speed alarm indicates that can help shift gears in time to achieve fuel-saving goals. Color: Black Material: Plastic Package Contents: 1 * Head-up Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.