Feature: 1. High Refresh: HUD speedometer features GPS and Beidou dual chipsets and high performance processing chip, with a 10Hz refresh rate for smoother display. 2. Power Supply Ways: Car HUD can be powered by car USB or cigar lighter, and will automatically power off when the vehicle is turned off to prevent power theft. 3. Large Font LED Display: HUD speedometer is equipped with a LED cold light display screen, featuring modern design and large fonts for clear visibility day or night. 4. Universal Compatibility: This smart GPS speedometer is suitable for all vehicle types including new energy vehicles, hybrids, motorcycles, fuel cars, public buses, trucks, etc. 5. Compact Design: With a small and ergonomic body, the HUD digital speed meter is designed to fit in any corner without obstructing the driver's view. Specification: Item Type: Digital Speedometer Body Material: PVC Plastic Size: Approx. 8x6x3.5cm / 3.15x2.36x1.38in Refresh Rate: 10 Frames/Second Screen Display: LED Cold Light Screen Fitment: Replacement for All Car Model Power Supply: USB Car Power Supply Built in Battery: No Waterproof: No. Package List: 1 x Main Unit 1 x USB Cable 2 x Double Sided Tape 1 x User Manual