?After-sales Service?Please use the original car charger, don't use mobile phone charger or USB cable+mini car charger or USB cable+computer! If You Have Any Questions About The Product, let us know and we'll be sure to help you out. ?Accurate GPS Navigation Signal?This Truck GPS System is based on offline navigation, which must work based on the active GPS signal. The built-in GPS chip works without a network, so you don't have to rely on your phones and cellular connectivity and the phone is free to use. Note: If the satellite signal can not be searched, it may be because of the reason at home, please search the GPS Navigation signal outdoors again. ? NAVIGATION FEATURES?1.Auto turn ON when power connected. Auto shut down when power removed 2. Provide 7 vehicle modes support, cars, trucks, bicycles, buses, ambulances, taxis and walking routes and special HGV functions. 3.Support for POSTCODE/for ADDRESS search 4.Built-in Hi-Fi speaker, with FM transmission function, navigation voice and music will be sent directly to the car speaker 5.Voice reminder speed limit and turn. ?7 inch GPS Navigation for Car?: 7-inch high-resolution and large screen, brighter with the resolution of 800x480, Clearer screen display, which gives you a better visual experience. (Note):Singly click the screen with the stylus point, or fingertip click. You can customize a better route according to your vehicle’s weight, length, height and width, thus avoiding the roads which have width restrictions or height restriction or weight restriction, etc. ?World Life Cycle Map, PRE-LOADED USA Canada Mexico Maps? Pre-installed with the 2023 latest North America Map, include USA Canada Mexico Maps, which has 2D / 3D map display. If you need to update the latest Map, please Let us know. we will provide you with the download address and guide(Downloadable but not pre-installed maps: Europe, UK, Ireland, Australia and so on).