Specification Brand : Garosa BulletPoint1 : ALL FREQUENCY EFFECT -- This speaker is all frequency effect, strong bass , the equivalent of traditional loudspeaker 8 inch bass effect. BulletPoint2 : Latest innovation, break through tradition limitations, 360 ° frequency transmission BulletPoint3 : Since there is no body standing , so all kinds of vocal music original, the sound quality of each sound frequency range is very clear BulletPoint4 : WIDE APPLICATIONS -- Suitable for computer, laptop, MP3, MP4, , mobile phone, PSP and other equipment sound playback and sound expand. BulletPoint5 : Sound penetration is strong, small size and convenient IsWaterproof : FALSE ItemName : Vibration Speaker, Resonance Speaker 50MM All Frequency Resonance Speaker Vibration Strong Bass, portable mp3 player line in speaker systems (4Ω 25W) ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 6 centimeters ItemPackageDimensions_Width : 6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : portable-mp3-player-line-in-speaker-systems Manufacturer : Garosa Material : Metal ModelName : Garosa34ocs9dahz-01 ModelNumber : Garosa34ocs9dahz-01 NumberOfItems : 1 PartNumber : Garosa34ocs9dahz-01 ProductDescription : Specifications: Color: steel Impedance power(Optional): 4 ? 25 w; 8 ? 20 w Type: electrodynamic (moving coil) Shape: round Diaphragm material: non-paper Magnetic circuit form: internal magnetic type Frequency characteristics: full spectrum band (full range) Rated power: 25W Frequency response: 20HZ -- 20KHZ (kHz) Directivity: positive Sensitivity: 95 (/W) Noise ratio: 90 () Harmonic distortion: 5 (TMD %) Size: 50 * 50 * 30 mm/1.97*1.97*1.18inch Weight: 268 g