About F15 HUD Functions: Display data: car speed, time, RPM, voltage, water temperature, travel time, travel distance, satellite number, altitude, travel direction, latitude and longitude, oil temperature, acceleration test, brake test, turbo preure, engine load and other car data. 6 alarm functions, including speed, water temperature, low voltage, high voltage, fatigue driving, vehicle DTC and other alarms. With this head-up display, you can clear the fault codes yourself without having to go to a repair store and pay for the repair. 5 display pages, 5 interfaces, free switching, LCD gauges, clear display of various data. 2 types of installation: with adjustable bracket, mounted on the dashboard or attached to the windshield. It allows you to understand your car more clearly without looking down at the dashboard and adds a sense of technology to your car. Specifications: Material: ABS+PC Screen Size: 3 Inch Screen Type: LED Input Signal: OBD Applicable models: Universal Color: Black Note: If your car is pre-2004 (for US automakers) and pre-2008 (for European/Asian automakers), OBD is not compatible. OBD is not compatible with some special vehicles, such as electric vehicles, diesel vehicles, hybrid vehicles, pickup trucks, paenger cars, etc. The F15 includes both OBD and GPS chipsets, OBD may not be compatible with your car, but it's still a cool HUD because its GPS works on all vehicles. Package Included: 1 x F15 HUD 1 x OBD Cable 1 x Rotary Holder 1 x English Manual About Y03 HUD: Functions: GPS and Beidou dual chips, the speedometer is very accurate, and the speed is refreshed quickly without any delay. Innovative design, with sunshine hood itself, good review even under sun. Plug & Play, after connect power supply, it will work directly, no need any other operation. Large font, clearly visible both during the day and at night. Speed unit is KMH (not support MPH). Wide application, it can work on all cars, trucks, buses, E-scooters, E-bikes. TheDevice is GPS Digital Speedometer, and speed is collected fromsatellites. So if tested at home or parking lot, perhaps speed can'tdisplay correctly. Please test it on the car outside with good signal. Note: it's speed display ONLY, no other function. Specification: Model: Y03 Screen Size: 2.8 Inch Material: ABS+PC Screen Type: LED Applicable models: Universal for most vehicles Color: Black and Green Package Included: 1 x HUD 1 x Micro USB Cable 1 x Anti-Slip Gel Pad 1 x Manual Do drop