1、Applicable Models: The Bluetooth adapter is a replacement for E85 E86 Z4 2.0, 2.5, 3.0 Coupe and Convertible models 2003‑2008. 2、High Performance: Adopts high end Bluetooth main control chip and audio digital processing chip, ensure stable audio signal transmission, and high definition sound quality. 3、Bluetooth Adapter: Allow you to easily have popular configuration of advanced car stereo, is the best choice for safe driving and enjoying digital music. 4、Excellent Sound Quality: Easily streaming music of Bluetooth devices into factory car stereo system, no interference and no loss of sound quality, rivaling original CD sound. 5、Easy Installation: Plug and play, installed via original CD changer port, easy and fast, perfectly integrated with the car. Item Type: Bluetooth Adapter Material: ABS Bluetooth Version: 5.0 Working Current: 20MA Sampling Frequency: 44.1/48/96KHz Frequency Response: 20Hz-20kHz Frequency Range: 2.402-2.480GHz Transmission Distance: Approx. 15m/49.21ft Distortion Rate: ≤1% Signal to Noise Ratio: 95dB Product Features: Audio HD transmission through the original car AUX signal Bluetooth version 5.0 supports aptX, aptX HD, aptX LL Support for TWS (Receive Mode) For Broadcom BK80OOL high end stereo chipset Integrated intelligent voice noise reduction technology to reduce echo and noise Before Installation: 2. This product only fits OEM or aftermarket car stereo with CD changer port and different solutions of Bluetooth adapter would be adopted according to different brands of vehicles or different car radios. 3. Make sure car stereo is powered off before installation. Otherwise the car stereo may be damaged. It is suggested to install it a car dealer shop or professional car stereo store. 5. Please read the car stereo wiring diagram carefully before installation (normally on the top side of car stereo）. Check and confirm where are the following ports on back of the stereo:CD changer port, B+/Ub+/12V ACC port(different car stereos has different names. such as: BAT, Bup+,B‑U,MEM +12, KL.30) andGND port. How to Install: 1. Turn off car engine and remove key from ignition, if car radio uses a security code, make sure that you have the code before unplugging the radio. 2. Unmount the radio from the dash in order to get access to the back side of the radio, and find CD Changer port at the back of the radio. For details of unmount, please refer to car user manual or car stereo manual, or ask professional staff to unmount the radio. 3. Connect wire harness to car stereo manual, or ask professional staff to unmount the radio. 3. Connect wire harness to car stereo radio module unit in advance. Be sure to make a firm connection. Then attach the wire harness connector to the back of stereo to the CD changer port. 4. For some car models, connect the red wire to B+/Ub+/12V ACC port (different car stereos has different names. such as: BAT, Bup+,B-U,MEM +12, KL.30) or other correct ACC power or 5 / 12V battery power. Connect the black wire to GND port of head unit power module unit. 5. Turn on the car and power on car Head Unit, press CD (or Disc / Mode / CDC / SOURCE / AUX) button for once or twice to switch to music play mode. 6. Turn on the Bluetooth function of mobile phone, search and pair with Bluetooth device named“JieRi BT5608”, Mobile phone will be able to connect to BTA after paired successfully. Test with mobile phone to confirm whether Bluetooth music work normally. 7. After successful test, re-assemble the radio, and put wire harness and module unit box in proper place (glove box, storage box, etc.), fasten screws between module unit and wire harness. Put back car head unit into original position. Now the installation is finished. Fitment: Fits for E85 E86 Z4 (2.0, 2.5, 3.0 Coupe and Convertible models) 2003 - 2008 Fits for E83 X3 2.0, 2.5, 3.0 2004 - 2010 Fits for COOPER (R50), for COOPER S (R53) JC WORKS Coupe Convertible 2000 - 2006 1 x Bluetooth Adapter 1 x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.