Features: Applicable to domestic car series, Asian car series, American car series and European car series, Equipped with high-precision GPS + Beidou dual-channel moduleFully automatic monitoring of vehicle driving conditions, Use the light intensity sensed by the sensor to adjust the screen brightnessLED light display, Designed with PC high temperature resistant material, with the car, automatic sleep function when parkingproduct This product is a vehicle-mounted HUD multifunctional display instrument, through GPS/The Beidou dual-channel module acquires data from satellites, and has the advantages of dual-signal stability, common to all models on the market, is a must-have artifact for self-driving enthusiasts.Product parameters: Power supply: 5VWorking temperature: -40~+80GPS data refresh rate: 1 sWireless transmission frequency: 2.4GHzGPSSpeed accuracy: Less than 0.36Km/hGPSClock error: Less than 1minuteVoltage measurement accuracy: 0.5VCold time: 32s (average)Hot time: 1 s (average)Main function and alarm functionSpeed, time, compass displayOverspeed alarmMaterial: Plasticcolour: blackPackage Contents:1 x heads up displayOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.