5.0 version, backward compatible. High-speed transmission without distortion, sound quality up to high-definition standards. With microphone, supports hands-free call, clear sound. Plug & Play: Easy and fast to install, perfectly integrated with the car. The product uses a wide range of 5-12V voltage input to adapt to different use environments. Allows 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: 53x30mm / 2.09x1.18 inches Package Includes: 1 Piece Audio Aux Cable Adapter 1 Piece Microphone 1 Piece Plug Note: 1. Please allow slight variation due to manual measurement. 2. Due to differences between monitor displays, the picture may not reflect the actual color of the item. Customer satisfaction is our primary concern. If the product is damaged during shipping, please contact us. We will do our best to provide a satisfactory solution.