2 inch Screen GPS HUD Auto Electronic Voltage Alarm Head-Up Display Car-Styling Speedometer Odometer Gauge Security Warning Alarm System Feature: 1. Using 10 Hz high refresh rate GPS+ Beidou dual-mode chip, the refresh rate is 10 frames per second, and the vehicle speed is refreshed quickly without delay; 2. Use car USB (5V) or switch from cigarette lighter to USB for power supply, and the car will be powered off when the car is turned off, with zero power consumption; 3. The speed calibration function is added, which can be adjusted to be consistent with the display on the car dashboard; 4. GPS precise positioning, real-time synchronous display of data, satellite collection of data, not affected by the weather; 5. Two alarm functions, speeding alarm and fatigue driving, improve driving safety; 6. Automatic light-sensing mode, which automatically adjusts the brightness of the display according to the intensity of external light to make it clearly visible under strong light. Functions: speed, single distance, driving direction, speed alarm, fatigue driving reminder, mile switch, automatic brightness adjustment. Specification: Product name: Head-up display Material: ABS Light color: White/Green Screen size: 2 inch Product size: 63.8x61.7x47.1mm/2.51x2.43x1.85in General: Compatible with all cars, trucks, bicycles and motorcycles Note: When using with a bicycle, please use a USB cable to connect the power bank. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 X Host 1 X USB Cable 1 X Non-Slip Mat 1 X Instruction