1. Built-in Bluetooth 2.1 + EDR wireless module.2. Bluetooth audio sound、 perfect sound quality and bass effect.3. 10M transmission distance. Support phone、 ipod and other devices with bluetooth function.4. Bluetooth hands free function、 answer call easily. Bluetooth music controlling function.5. Built-in rechargeable Li-ion battery、 lasts for up to about 7 hours per charge.6. 3.5audio input jack Technical parameters:Rated impedance:4.0hmRated power:3WRated voltage: DC5VFrequency response:3dBRMS:1.2WFrequency scope: 170-15KHzPower supply: DC 5V Built-in Li-ion batterySpeake:2 inchesNote:Colors may are a little different from the picture. It is normal due to the resolution difference of your computer.