Description: Features: brand new and high quality The horn is all frequency effect, the is very strong, the equivalent of traditional loudspeaker 8 inch effect. Latest innovation, break through tradition limitations, 360 frequency transmission. Since there is no body standing wave, so all kinds of vocal music original, the sound quality of each sound frequency range is very clear. Sound penetration is strong, small size and convenient. Suitable for computer, laptop, MP3, MP4, CD, mobile phone, for PSP and other equipment sound playback and sound expand. Specification: Optional impedance/power: 4/25W, 8/20W Frequency response: 20Hz-20KHz Noise ratio: 90dB Sensitivity: 95dB/W Diaphragm material: Non-paper Dimensions: 50x30mm/1.97x1.18''(diameter x height)(approx) Color: Random color(If you buy more than one, you may receive the same color or several colors.) Quantity: 1 pc Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Vibration Speaker(other accessories demo in the picture is not included.)