Features 【Full Frequency Resonance Speaker】This 50mm Round Resonant Speaker Latest innovation, break through tradition limitations, 360 ° frequency transmission, Frequency response: 20HZ to 20KHZ, 【Strong Bass】The horn is all frequency effect, use this resonant speaker will bring you very strong bass effect, the equivalent of traditional loudspeaker 8 inch bass effect. 【Applications】This Resonant Speaker are widely used, suitable for computer, laptop, MP3, MP4, CD, mobile phone and other equipment sound playback and sound expand. 【Clear&Original Audio】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, this resonant speaker will bring a wonderful experience. 【Strong Sound】Sound penetration is strong, small size and convenient, we provide 4Ω 25w and 8Ω 20w type resonant speaker for choose. <strong>Specifications:</strong> Color: steel Impedance power(Optional): 4Ω 25w;8Ω 20w 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 (dB/W) Noise ratio: 90 (dB) Harmonic distortion: 5 (TMD %) Size: 50 * 50 * 30 mm/1.97*1.97*1.18inch Weight: 268 g <strong>Package Included:</strong> 1 x&nbsp; Vibration Speaker Package List