We are a lead supplier for mini speakers in China, in mini portable speakers industry, our best quality, service and cheap price for Sound Card Speakers is our base to be a leader, which makes us have very good sales for Card Speaker in all of the world.   New series with unique design. Fashionable crystal outlook make it outstanding in the market. Strong high sound and pure bass by high-quality speaker with built-in Hi-fi digital amplifier system makes it unforgettable. Unbelievable loud volume with such a small speaker, and even the simulant bass. This speaker use hi-tech digital circuit, hi-efficient NeFeB magnetic, whole tone speaker with special designed resonance box, making a strong hight bass, treble,pure perfect sound. Item Name: Short Metal Tube Speaker-Green Other Name: Wasp Mini Speaker Model No.: W-302 Description: 1.Size:5*7.4*5 cm Aluminum   2.Battery:Built-in Li-battery 550mAH                 3.Output:RMS 3W single channel THD=10%                       4.Frequency response:150-18000Hz(3dB)  S/N ratio:80dB                               5.Speaker:1.77inch ,Outer diameter 45mm,Impedance:4             6.Input:5-5.5V/ 1000mA, AC power adapter