A compact incar MP3 player and FM transmitter that gives you simple, reliable audio and hands calling using your car stereo. Designed to play music from TF (microSD) cards and USB U disks, connect via AUX, or wirelessly stream audio while transmitting to your car radio, this unit keeps calls and entertainment accessible and safe while you drive. Key benefits Unified audio source: play MP3 files directly from a TF card or U disk, connect an external player via AUX, or stream wirelessly to the transmitter to use your car's speakers. Safer driving: builtin wireless handsfree calling lets you answer and end calls without handling your phone, keeping attention on the road. Simple setup and operation: plug in, select an FM channel or AUX input, insert media or pair wirelessly, and start listening quickly. Memory function: remembers the last settings (such as last frequency or track) so you don't have to reconfigure each trip. Main features MP3 playback: supports MP3 files from TF (microSD) cards and U disk USB storage for offline music playback. FM transmitter/receiver: sends audio to your car radio on an available FM frequency and can receive radio signals as needed. Wireless handsfree calling: make and answer calls through the car stereo using the device's wireless connectivity and builtin microphone. AUX player: supports wired AUX connection for direct audio input or output when available. Memory function: retains prior frequency and playback state for convenience between uses. Compact, carfriendly design: small, portable form factor intended for invehicle use and easy placement. Compatibility and performance Works with vehicles that have an FM radio or an AUX input. Supports MP3 format files on TF cards and U disk storage devices. Compatible with most smartphones and audio sources that support wireless audio transmission and/or wired AUX output. Delivers clear audio and reliable FM transmission for everyday driving music and calls. Performance depends on local FM signal conditions and media file quality. Typical use cases 1) Music from USB or TF card: Load a TF card or U disk with MP3 files, insert it into the player, select an FM frequency on the device and your car radio, and enjoy your stored music without needing a phone. 2) Hands calling while driving: Pair your phone wirelessly, answer incoming calls through the car stereo using the device's controls, and speak through the builtin microphone for safer, hands conversations. 3) Flexible source switching: Use the device as an AUX player when a direct wired connection is available, or transmit phone audio wirelessly to the car radio when no AUX input is present. How to use (simple steps) Insert a TF card or U disk with MP3 files, or connect a source via AUX. Power and set the device to an unused FM frequency. Tune your car radio to the same FM frequency to hear audio through the vehicle speakers. For wireless calls or streaming, pair your phone to the device, then play audio or accept calls using the device controls. The memory function will retain your last used settings for the next drive. What you get A multifunction car MP3 player and FM transmitter/receiver that supports TF card and U disk playback, AUX input, and wireless hands calling. A compact, easytooperate solution for bringing music and safer calling to older car stereos without modern connectivity. Notes Audio quality and FM reception can vary with local radio interference and car stereo sensitivity. Supported audio format: MP3 (from TF card / U disk). Compatibility with other formats depends on the media files and the device's file support.