Features:<br> Multifunction Speedometer displays speed, clock, number of satellites, direction of travel, and other driving information directly in your line of sight. View essential data safely without taking your eyes off the road, helping you stay focused and drive more safely.<br> Compatible with all vehicles, the G4S GPS Speedometer displays MPH and driving time. Features an HD display with automatic light-sensing screen that adjusts brightness based on ambient lighting, ensuring clear visibility day or night, even in strong sunlight.<br> Premium 2022 design with GPS + Beidou dual-mode chips for fast refresh rates and no lag. Speed is collected via GPS satellites, independent of the vehicle's engine system, making it universally compatible with cars, trucks, SUVs, motorcycles, and other vehicles.<br> Driving Safety Alert: Stay focused on the road. The digital display allows you to check speed at a glance without looking down. Information is projected directly into your view, minimizing distractions and reducing accident risks.<br> Simple installation: Mount the device near the dashboard or use the 360-degree rotating suction cup on the windshield. Plug and play with USB power from the cigarette lighter. Automatically powers on and off with the vehicle’s ignition. Note: This device relies on vehicle power and does not retain distance data when powered off.<br> Backed by CE, FCC, and RoHS certifications. Includes responsive customer support for any inquiries. We aim to provide timely assistance and ensure full satisfaction.<br> Specifications:<br> Color: Green light<br> Screen size: 2.2 inch<br> Product dimensions: 52 x 52 mm<br> Box dimensions: 10 x 7.5 x 7.5 cm<br> Total weight: 150 g<br> Package contents:<br> 1 x HUD<br> 1 x USB cable<br> 1 x Suction cup holder<br> 1 x Double-sided tape<br> 1 x User manual<br> Troubleshooting Guide:<br> 1. No display or power: Check USB cable for damage. Use only 5V or lower voltage.<br> 2. No speed reading: Flashing satellite icon indicates signal search. Move to an open area and wait for a stable signal.<br> 3. Incorrect speed: Confirm correct unit setting (km/h or mph). Note that factory dashboards may display speeds 5-7% higher than actual. Adjust calibration if needed.<br> 4. Wrong driving direction: Direction is determined when speed exceeds 5 km/h.<br> 5. Speed shown when stopped: Signal interference in tunnels, underground parking, or shielded areas may cause drift. Drive to an open area for accurate readings.<br> 6. Buzzer control: Press and hold left wheel button for 2 seconds to turn buzzer off. Press again to re-enable.