Name: Bluetooth AUX Adapter for E90 E91 E92 E93 Cable: A57495 Material: Plastic Cable length: Approx. 20 cm Color: Black Black: GND- Red: 12V+ Bluetooth module interface: 12V Plug and play Bluetooth AUX input adapter, allowing you to play music to your car radio via your phone's/smartphone's Bluetooth function. Car charger adapter for connection to the cigarette lighter (Input: 12V DC, Output: 5V/1000mA DC). Supports all Bluetooth-enabled devices, without limitations on the car radio's functionality. Allows connection to external audio sources. Interface: USB interface, 3.5mm interface. Suitable for all vehicles with original or aftermarket AUX input interfaces powered via USB or cigarette lighter. The original AUX interface can be located in the glove compartment, glove box, under the center armrest, or near the handbrake. Package includes: 1 Bluetooth adapter AUX cable. Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the actual item. The measurement error is ±1-3 cm. Applicable car models: Suitable for all car models, as long as the original car has an AUX interface. Bluetooth name: JieRui-BT 5908 Bluetooth version: 5.0 Product voltage: 5-12V Product features: Uses JieRui Bluetooth main control chip, Bluetooth 5.0 version, high-speed transmission without distortion, sound quality reaches high-definition standards. This car Bluetooth music player has wireless music transmission function, designed for older and current car audio systems. Many consumers find it inconvenient to listen to music. If the car does not have a reserved audio input port, it requires burning discs, and disc audio source updates are slow and inconvenient. Even in cars equipped with external audio input ports, listening to music requires pulling a long signal cable, which is inconvenient. Using Bluetooth transmission eliminates clutter and allows seamless online music playback. In the streaming era, various online apps offer convenient access and fast audio updates. This product is designed for various car brands and models, equipped with different connectors to match the interfaces on the back of the original car's head unit. It uses a wide voltage input range to adapt to different operating environments.