What is a HUD? HUD is an acronym for Head-Up Display. It can display the driving data such as speed, rotation speed, fuel consumption, water temperature, and voltage on the front window glass of the car; avoid the driver from looking at the instrument while driving and causing unsafe. The driver can instantly read the driving information and always stay in the best condition through the HUD. Why use a HUD? 1.Drive safely, don"'"t look down at the data of the car meter, so that the safety of you and your family is guaranteed! 2.It has a decorative effect, creates a technological style, and makes the interior of the car cool!Safe and beautiful! Product Description:Applicable modelsM13 is suitable for some gasoline vehicles produced after 2007, and has OBD2 agreement/EOBD agreement; M13Plus is suitable for all cars;Plug and PlayUse the OBD cable/USB cable to connect the machine and the car, no other operations are required, it can be used directly;No jump speedThe display is coherent and smooth without any burden;OBD system + GPS chipThe speed measurement is very accurate, the speed refreshes quickly, and there is no delay;Frontshield ProjectorProject car data onto the front windshield, and present a reflective film, so that the data display has no ghosting and the display is clearer;Multiple functionsSpeed, speed, voltage, water temperature, fuel consumption, time, mileage...After-sales serviceAfter receiving the machine, please test it immediately with a good outdoor signal.