Features: GPS and Beidou Dual-Mode Chip: The GPS speedometer is equipped with a 10Hz high refresh rate GPS and Beidou dual-mode chip, ensuring a rapid refresh rate of 10 frames per second, providing you with accurate and real-time speed updates with zero delay. Never worry about lagging speed readings again. Overspeed Alarm: The car head-up display features an overspeed alarm function that automatically flashes when the vehicle's speed exceeds the preset maximum driving speed, ensuring safer driving by helping drivers maintain their speed within the legal limit. Automatic Sensitivity Adjustment: Automatic Power On/Off: This head-up display for cars is designed with your convenience in mind. It automatically powers on and off with your vehicle's ignition, saving you the hassle of manually turning the device on and off. Just start your car and the display is ready to go, and when you're done, it shuts off with your vehicle. Universal Compatibility and Easy Installation: Specifications: Main Material: ABS, PC Screen Size: 3 inches Screen Type: LED Product Color: Black Product Size: 77*53*28mm/3.04*2.09*1.1inch Package Information: Package Size: 10*7.5*7.5cm/3.94*2.95*2.95inch Package Weight: 160g/0.35lb Package List: 1 * Heads Up Display 1 * Rotary Suction Cup Holder 1 * USB Cable 1 * Non-slip Mat 1 * Instructions