3" Car HUD Projector Head Up Display Speed Warning Fuel OBD II SpeedometerKey Features...Automatically adapt to the model, plug and play models that comply with OBD II or EUOBD.3 inch HD display, Multi-color screen design makes the picture richer and easier to read.Using nanotechnology to eliminate unwanted reflections, the picture is clearer.Display content is rich: driving speed, engine speed, w..