1 output: THD rms3w = 10%<br />2 response frequency: 150-18000hz<br />3 SNR: more than 80dB<br />4 voice: 1.77inch (outside diameter 45mm) no magnetic<br />5.dc-5v charge<br />6 battery capacity: 6000 Ma lithium battery<br /><img src="http://img6.eachbuyer.com/x9/p100/eb03189_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_7.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_13.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_15.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_17.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_20.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_25.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb03189_26.jpg" />