Head-up Display USB Powered High-definition Vehicle Code Altitude Meter 1. High-end composite material, PC+ABS, high temperature resistance and no deformation 2. Multiple installation methods, free placement 3. Not limited to car models, all cars can be used 4. USB connection, simple installation, ignition on, ignition off 5. 4.6-inch LED, large font is clearer, important data is clear at a glance 6. Built-in light sensor, brightness automatically adjusts with ambient light 7. Satellite timing, accurate display without manual calibration 8. 10 Hz high refresh rate, fast refresh, no delay, up to 32 satellites can be received 9. Overspeed alarm, the alarm light gradually flashes from the middle to both sides and emits a beeping sound 10. Vehicle speed linkage, according to the alarm value, each light represents a certain speed value, the default alarm speed is 130kmh, and each light represents a value of 13010=13kmh 11. 5 major interface combinations, using numerical lubrication algorithm, the display is more coherent and smooth, without speed jump