Use of full-frequency FM wireless transmission technology Support Bluetooth audio playback and Bluetooth hands-free calling. Supports file types: MP3 / WMA / APE / FLAC / WAV Support smart APP function, high quality lossless audio decoding; Automotive battery voltage health warning and high speed car charger in multifunctional car MP3 Support bluetooth music shooting distance <5m/Bluetooth hands-free calling LED display, it can display frequency, song number and working status information Support switch folder playback function Support turn off memory function It can charge two mobile phones at the same time and can enjoy music when charging the phone Accuracy of structural design Noise elimination function, built-in noise cancellation circuit, make the call more clear Things to confirm before buying: 1. Check if your car has an extra empty gear bay 2. Check whether the key hole is about 2.2cm x 3.3cm 3. If you need the audio feature, please make sure you have the USB audio feature for your USB audio to work Noticeable: Due to the difference between different monitors, the pictures may not reflect the actual color of the item Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement