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What can you do with this Bluetooth receiver? Receive music or audio and transmit it to your car audio system. You can enjoy high quality music playing with it. In fact， it can work with any speakers with a 3.5 mm Jack. Just get one to turn your Hi-Fi system into wireless. It is compatible with all iPhones， all iPads， Android devices， and other smartphones that are A2DP Bluetooth enabled.Features:- Supports handsfree calling through Bluetooth receiver- Auto Sleep mode for saving Power- Compatible with home stereos / speakers， car stereos， headphones- Supports iPhone， Android phones， other smart phones which with Bluetooth A2DP functionsParameters:- Bluetooth version: Bluetooth V3.0- Bluetooth Profile: A2DP Stereo Profile- Bluetooth Distance: Up to 33 inches (10 meters)- 3.5mm Jack plug - Run Time: Up to 8 HoursSupports: Bluetooth， Hands-free Calls， Microphone Interface: Micro USB， 3.5mm Jack Bluetooth Version: V3.0 Protocol : A2DP Transmission Distance: W/O obstacles ≤10mLasting Time: Up to 8 hoursPackage weight: 0.0657 kg Product Size (L x W x H): 5.3 x 2.5 x 1 cm / 2.08 x 0.98 x 0.39 inches Package Size (L x W x H): 11 x 7.5 x 2 cm / 4.32 x 2.95 x 0.79 inchesPackage Includes: 1 x Bluetooth 3.0 Audio Music Receiver， 1 x USB Cable， 1 x English Manual