Highlights: 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     Specifications: Color: Black/Blue/Dark Pink/Light Pink/Green/Yellow (Optional) Shape: Mushroom Gross Weight: App. 110g Rated impedance:4.0hm   Rated power:3W   Rated voltage: DC5V   Frequency response:3dB   RMS:1.2W   Frequency scope: 170-15KHz   Power supply: DC 5V Built-in Li-ion battery   Speaker:2 inches  Note: Colors may are a little different from the picture. It is normal due to the resolution difference of your computer.