Madezz 1pc Vibration Speaker, 50MM 2Inch All Frequency Resonance Speaker Vibration Strong Bass Louderspeaker Compatible with Computer Laptop MP3 MP4 CD Mobile Phone PSP(4Ω 25W)

Color:4Ω 25W Specifications: Color: steel Impedance power(Optional): 4 Ω 25 w; 8 Ω 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 (dB/W) Noise ratio: 90 (dB) Harmonic distortion: 5 (TMD %) Size: 50 * 50 * 30 mm/1.97*1.97*1.18inch Weight: 268 g Package Included: 1 x Vibration Speaker