5.0 version, backward compatible.High-speed transmission without distortion, sound quality up to high-definition standards. With microphone, support handfree call,clear sound. Plug & Play: Easy and fast to be installed , perfectly integrated with the car. The product uses a wide range of 5-12V voltage input to adapt to different use environments. Allow you to easily have popular configuration of advanced car stereo, is the best choice for safe driving and enjoying digital music. Fitment: for Z4 E85 E86 X3 E83 for Mini Cooper R50 S R53 Specification: version: 5.0 (backward compatible) Voltage: 5-12V Microphone cable length: 1.5 meters Material: PVC polyvinyl chloride Fitment: for Z4 E85/E86 (2.0, 2.5, 3.0 & Coupe and Convertible Models) 2003-2008 for X3 E83 (2.0, 2.5, 3.0 & xDrive models) 2004-2010 for Mini Cooper: for Cooper R50, for Cooper S R53 & JC Works (Coupe & Convertible) 2000-2006 Size Chart: 53x30mm/2.09x1.18inch Package Includes: 1 Piece Audio Aux Cable Adapter 1 Piece Microphone 1 Piece Plug Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!Customer satisfaction is our primary concern. If the product is somehow cracked or broken during shipping, please feel free to contact us. We will try our best to give you a satisfactory solution.