Notice - The Device is GPS Digital Speedometer, and all data are collected from satellites. So if tested at home, perhaps speed and time can't display correctly. Please test it on the car outside with good signal.WORKS FOR ALL VEHICLES Unlike other Car HUDs, you do not need to worry about the compatibly, it could work for ALL vehicles, no matter which brand or which model all over the world cause it is based on the GPS module inside. Solar Powered HUD is equipped with a solar Panel, it can charge automatically under sunshine, and can also connect the device to car power supply with USB cable. But Solar power can only extend the battery working time, can't replace USB Cable charging directly. RICH CONTENTS Almost everything you may need to read during driving will be shown by this HUD, including vehicle speed, Clock, Altitude, km/h & mph, Car's ambient temperature and battery level, over speed alarm, fatigue driving alarm. A great partner for your driving. MULTIFUNCTIONS HUD has been upgraded with new functions which make it different and more competitive than the traditional HUD in the market. Because it is based on the GPS module and satellite, so it can be used to read car data information. A multi-functional tool to help you know about your car. Driving speed calibration-If the speed is not accurate, can make driving speed calibration by hand: long press ''SET'' button to enter setting page, when press ''SET'' button every 3 seconds, you will see the data display area is flashing, select the speed value, can add and decrease the speed unit as your need. Time calibration-If time can't be corrected automatically when tested on the car, can adjust time by hand also (same procedure as above speed calibration). Item Information:Screen Display: Speed/Time/Temperature/Altitude Display Alarm Function: Fatigure Driving Alarm / Overspeed Alarm Charging Way: USB Charging + Solar Power ChargingVibration Induction: Screen turn on when vibration, screen turn off when long time parking Screen brightness adjustment: Screen brighter and clearer at daytime , Screen softer at night GPS Positioning system Package Including: Solar HUD X1 USB Charging Cable X1 Anti-slip sticker X1 User manual X1 Built-in GPS Chips, 100% suitable for all cars, buses, trucks Multi-function Display:suitable for more driving modeSolar Powered + USB Charging Product Features:1. Easy to read the display data 2. Auto-adjust Brightness 3. The devices turns on / off when car starts or stops AlarmsPackage Specs: