Built-in fuse, can better protect the equipmentUsing BK bluetooth master chip, bluetooth version 5.0, high-speed transmission without distortion and high-definition sound qualityWith unlimited music transmission functionUsing bluetooth transmission, you can say goodbye to messy, and you can also play music online. In the era of streaming media, various online APPs are quite convenient, and the audio source is updated in timeFor models of different brands, according to the ports reserved at the back of the cars main engine, equipped with different connectorsThe product uses a wide range of voltage input to adapt to different use environmentsLightly press the function button to change the next song, long press the function button for two seconds to switch to the previous songIf the call comes, tap the function key to answer the call. If you need to hang up, tap the function key to hang upThe product adopts high-end bluetooth module with noise reduction filter function, and the product uses digital audio processing to restore HIFI sound qualityApplicable models for :2002 - 2006 for BMW (E46): 320i, 320ci, 320cic, 323i, 323ci, 323cic, 325i, 325ci, 325cic, 328i,328ci, 328cic,330i, 330ci, 330cic M3 (Coupe, Sedan Convertible)09/2002+Note: Will work ONLY for BMW E46 3 Series Business CD head units since 09/2002 or newer , The E46 Business CD head unit manufactured time must be 09/2002 or newerName: Car Audio Bluetooth AdapterVoltage: 5-12VColour:blackMaterial:plasticSize:Cable length: approx. 30 cmMicrophone cord length: 1.5 metersPackage Contents:1 x Car Audio Bluetooth Adapter1 x MicrophoneOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.