?Customer Service and Technical Support?We offer 30-day Money-Back, 12-month Replacement, life-time Technical Support. Please feel free to contact us if you have any questions, we will reply to you within 18 hours and help you solve the problem. ?How to get sound from the car speaker?This 7-inch touch screen car stereo with built-in speaker, but if you want louder sound, you can transmit its sound to the car speaker in two ways: ?Using an FM transmitter, you can set the same frequency on the device and the car radio. ?Using an AUX cable, if there is an AUX interface on the car, connect it to the original auxiliary interface on the car through the AUX cable. ?Portable CarPlay with Backup Camera?We prepare a wired rear view camera to help parking, which will automatically switch to the reversing video, supports grid lines adjustment (can be switched on/off or adjusted).With 64G TF card, you can copy the files to play videos or music. ?Easy Installation & Fit All Different Car?Plug and play directly with dashboard via connect cigarette lighter.You don't need to disassemble your car's console, keep your car original radio, perfect coexistence.The car radio with screen is suitable for most motor vehicles, such as cars, trucks, vans, buses, pickups,sedans, RVs, campers, and more. ?Unique Buttons and Adjustable Mount Design?There are buttons on the front of the portable car screen that can quickly turn off the display, adjust the volume or switch songs. Portable car stereo apple carplay monitor included an adjustable dash mount extends, tilts, and swivels for optimal viewing and access. Extend the screen up to 5 inches towards the driver for optimal visibility and easy touch access while driving. Swivel left or right for passenger viewing. Tilt to avoid sun glare. ?Wireless CarPlay & Android Auto?Our portable carplay car stereo can easily connects to smartphones to enter another smart system and allows you to access phones maps, calls, messages, music, and more apps by wireless connection, much safer than using phones when driving.