Product Features:<br />1. Built-in Bluetooth 2.1 + EDR wireless module. <br />2. Bluetooth audio sound｣ｬ perfect sound quality and bass effect. <br />3. 10M transmission distance. Support phone｣ｬother devices with blue-tooth function. <br />4. Bluetooth hands free function｣ｬ answer call easily. Bluetooth music controlling function. <br />5. Built-in rechargeable Li-ion battery｣ｬ lasts for up to about 7 hours per charge.<br /><br />Technical parameters: <br />Rated inpedance:4.0hm <br />Rated power:3W <br />Rated voltage: DC5V <br />Frequency respon:3dB <br />RMS:1.2W <br />Frequency scope: 170-15KHz <br />Power supply: DC 5V Built-in Li-ion battery <br />Speaker:2 inches<br /><br />Package including: 1pc*speaker<br /><br />Note:Colors may are a little different from the picture. It is normal due to the resolution difference of your computer.