Product Features:,Wireless, Cool and Free!,Convert wired ear-buds to wireless headset.Convert wired speaker to wireless Speaker,Two-link: can connect two Bluetooth devices at the same time. And reach up to 30 feet in open space without cables.With this receiver,Aux socket can receive music from cellphone wireless,Transfer wire headphones to wireless Bluetooth headset: then connect to iPhone, Android phones, other smart phones which with Bluetooth A2DP functions.,Stereo Audio Output: Use with home stereos, speakers, car stereos, headphones etc by 3.5mm stereo inlet socket.,,,Specifications:,Bluetooth version: 4.1,Bluetooth protocol: A2DP AVRCP HFP HSP,Battery: 3.7V 60mAh,Charging power: 5V/80mAh,Sensitivity: 103db +/- 3dB,Impedance: 32Mw,Tramsmit distance: about 10m,Frequency: 2.4GHz,Conversation time: about 2h,Music playing time: About 2.5h,Standby time: About 80h,,,Package:,1 X Bluetooth Receiver,1 X 3.5mm Audio Connector.,1 X User Manual