The horn is all frequency effect, the bass is very strong, the equivalent of traditional loudspeaker 8 times bass effect. Latest , break through tradition limitations, 360 ° frequency transmission. Since there is no body standing wave, so all kinds of vocal music, 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. Impedance power: 8 Ohm 20W Rated power: 20W Type: electrodynamic (moving coil) Shape: round Magnetic circuit form: internal magnetic type Frequency characteristics: full spectrum band (full range) Frequency response: 20HZ - 20KHZ Directivity: positive Sensitivity: 95 (dB/W) Noise ratio: 90 (dB) Harmonic distortion: 5 (TMD %) size:50x50x30MM Material:metal colour:Silver Package Contents: 1 * Vibration Speaker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.