Easy to install (step 1: put the plug into car's USB & AUX 3.5 socket;step 2: part of car need to choose Audio AUX model for play music before the step 3; step 3: connect the bluetooth adapter by cell phone/ipod/device to play music; 4. Please restart cell phone to connect the adapter if did not success at first time. | Purchase Notes: this bluetooth adapter ①does not support simultaneous charging via USB and streaming of music. ②does not with handsfree feature because the safe driving law not allow. ③does not with volume control unit button. ④dose not support change songs from the iDrive system/ steering wheel. ⑤the playlist will not be displayed on the car screen ⑦a little part cell phone need update a new soft version to compatibility this adapter⑧Audio was modification may be will not work with this adapter | Blue LED Light Up: bluetooth mode (USB port charging function off); Red LED Light Up: USB mode (Bluetooth transmission function off) you can charge your device, or use the USB function to listen music (note that few MMI system don't support USB function) | Vehicle compatibility: BMW 1/3/5/6/7 series (2004~2016) and BMW X1 X3 X5 X6 (2006~2013) and Mini Cooper R55, R56, R57 (2007~2016)(Not fit have got the Dashboard navigation system/screen models), NOT with Z4 or E46.( Also fit for Most of vehicles/ home appliance audio with USB/AUX IN interface Bluetooth transmission function)(please contact with us get help if got any unsatisfied with the item, thank you!) | This adapter fits BMW and MINI cooper models with AUX IN and USB (S6FLA) ports and BMW's without an in dash navigation system/screen.(this bluetooth adapter with not much of functions, but the Sound stable and the Quality will better than other FM channel bluetooth transmission product)