Feature: 1. Plug & Play: After connecting to the power supply, car HUD head up display can work directly without any other operations. No skip speed, more coherent and smooth display. 2. Innovative Design: Self equipped sunshade hat, even in the sun smart digital speed meter can also receive praise. And large font, clearly visible during the day and night. 3. Note: This device is a GPS digital speedometer, and the speed is collected from satellites. So if you test at home or a parking lot, perhaps the speed cannot be displayed correctly. Please conduct the test outside the vehicle with good signal. 4. Widely Used: Built-in GPS chip, car HUD head up display is suitable for all cars, buses, trucks, bicycles, scooters. Specifications Output Frequency:GPS Digital Speedometer Rated Power:HUD Head Up Display Size Name:92x52x20mm Electronics:Car accessories HUD:Windshield Speed Projector Package Included: 1 x Head Up Display