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Dynamic speed measurement: The head-up display uses dual-mode signal integration technology for fast and accurate real-time speed display. Automatic brightness adjustment: A built-in light sensor automatically adjusts the display brightness to ambient light. This ensures good visibility in both sunlight and darkness, improving safety and comfort. Universal compatibility: Suitable for all vehicles with a USB interface, including cars, motorcycles and trucks. Quick and easy installation, ideal for all vehicle types. Plug and Play: Simply connect the device via USB and it automatically switches on and off with the vehicle. No tools or complicated installation required. Large and clear display: Large numbers ensure excellent readability. Product features: Dynamic speed display: Dual-source positioning technology enables accurate real-time calibration and a high-contrast display. Automatic brightness adjustment: Intelligently adapts to day and night; prevents glare. Universal Plug and Play: Quick installation via USB; suitable for cars, trucks and motorcycles; automatic on/off. Compact design: Neatly mounted on the windshield; anti-slip pads ensure secure attachment, even on uneven roads. Signal warning: Indoor signals may be weak. For best results, place the device near a window.