Features:- Support hands free， can connect microphone and support phone calling through Bluetooth receiver- Sleep mode for saving Power- Compatible with home stereos / speakers， car stereos， headphones- Support 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 Stereo Inlet Socket- Run Time: Up to 8 HoursProduct Description:Design: Cool， Mini， Car Supports: Bluetooth， Hands-free Calls， Microphone Functions: Auto Sleep Compatible With: iPhone， PSP， Laptop， PC， iPod Connection: Wireless Interface: Micro USB， 3.5mm Audio Audio Source: Bluetooth Enabled Devices Color: BlackBluetooth Version: V3.0 Protocol : A2DP Transmission Distance: W/O obstacles ≤10mPower Source: USB Lasting Time: Up to 8 hoursPackage Contents: 1 x Bluetooth 3.0 Audio Music Receiver， 1 x USB Cable， 1 x English Manual