Not Network Restricted Storage Supports insertion of a TF card and USB flash drive, expandable up to 32G, ensuring ample offline storage and operability without relying on network connectivity. Simple and Convenient Operation Large screen display and rotary button design provide an easytouse solution for staying connected on the road. Seamless connectivity is available without the need for external energy sources. Intelligent Voltage Detection Builtin intelligent voltage detection function offers added protection for your car and equipment during use. Streamlined Audio Management Leverages the adapter's wireless transmission capability to connect your phone to your car stereo for effortless song selection, call answering, and volume adjustments. Use scenarios Road trips and daily drives: load music or other audio files via TF card or USB flash drive, then enjoy offline playback with simple controls on the large display. Daily commuting: wirelessly stream audio from your phone to the car stereo, while easily selecting tracks, answering calls, and adjusting volume. Fleet or longshift vehicles: rely on offline storage for media without network access, with straightforward operation and protection from voltage fluctuations.