Origin:Mainland China accessories for car:hud display car electronics:heads up display electronicos:gps speedometer hud display car:car hud Head Up Display Car Hud GPS Speedometer On Board Computer Smart Digital Clock Alarm Gauge Automobile Car Accessory Electronics Features: Functions:Speed, clock, driving direction, driving distance, driving time, number of satellites, 100km acceleration time, driving direction angle, altitude. Alarm: speeding alarm, fatigue driving alarm. Small body, clear and natural in any corner, without blocking any line of sight. A variety of displays, one-key switching. Zero consumption of USB power supply, complete power off when the car is turned off. Universal for All Vehicles. Specifications: Screen Type: LED Resolution: HD Material: ABS+PC Colour: Black Size: As the picture show Fits for:Universal For All Vehicles Troubleshooting: 1.The screen without any display, and no power: Check whether the USB cable is damaged, replace the USB cable for testing, and prohibit the use of voltage higher than 5V for power supply. 2.Without car speed:After HUD power-on, the satellite icon flashes will start to find the satellite. Please driving the car to the road. It will work after it stops flashing. 3. Time adjustment:After the satellite icon is flashing and the satellite is found, long press in to enter the setting, short press in to turn to 6, adjust and calibrate the local time. 4.Inaccurate speed :a. First check the speed unit is correct or not, the speed unit including KM/H and MPH, please refer to the setting to switch the unit. b. The car manufacturers usually make the dashboard speed 5-7% higher than the ECU. The international standard is based on satellite data.(if the dashboard shows 100, and the device shows the 105, change the default value at 102) 5.Driving direction display error: After the vehicle speed exceeds 5KM / H, the direction can be displayed normally. 6. Speed is still displayed after the car stops: Under the underground parking lot, tunnel, under the overpass, there will be unstable satellite drift when there is obstruction. 7.Turn off the buzzer:Press left for 2 seconds to turn off the buzzer, again to turn on. Package included: 1x HUDSpeedometer 1x USB Cable 1xNon-slip double-sided stickers 1x User Manual