Features:1. Support A2DP/IPOT using the latest Bluetooth 4.0 technology， support A2DP agreement， not only greatly improve the data transfer rate， but also ensure the stability of audio and sound quality.2. Apt-X is a nondestructive compression technology， not only provides us a broader bandwidth. Voice transmission is more comparable to CD quality. Even if your device does not support other Apt-X， no need worry， this product also supports earlier SBC encoding.What equipment can be used with this product?If your device with Bluetooth function， and support Bluetooth A2DP agreement， can be used with this product. Such as: ipad， iphone， ipod touch， other brand mobile phones and ordinary computers， etc.3. This product can memory 10 groups device which paired with it already， and automatically paired when next time you use.4. This product uses optical fiber， coaxial line and 3.5mm audio output， ensure the super sound quality and easy to connect with all devices.5. Transmission distance up to 10m (Note: the actual use of Samsung mobile phone， it can up to 20m)Specifications:Bluetooth specification A2DP/IOPTApt-X code SupportSBC Code SupportMemory group number 10Bluetooth Frequency 2402-2480MHzPower supply 5V/2AEffective Distance 20mDimension 91*57*27mmAudio R/L output specificationsOutput level 2+/-10% VrmsFrequency response 20Hz-20KHzThe L/R channel isolation -45dBSNR >=90dbTHD 0.05%Optical output specificationsWavelength(nominal) 640-670nmOptical power output -17BmPackage Includes:1X Bluetooth music receiver1X Power adapter (with travel power converter according to your country: US/EU Standard)1X 3.5mm audio cable1X 3.5mm (Female) to a RCA audio cable1X User manual