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Description:Model No.: YDT1318-100 Product Origin: China Brand Name: SJ Supply Ability: 250,000pcs/month Minimum Order: 1,000pcs Delivery Lead Time: 10 days See the most recent posting for this Dynamic Mini Speaker (May 09, 2006) Detailed Product Description Features: 1) The shape of this product is oval designed, clearly sound quality, the high bass is effective, higher S.P.L, wide-band, function stability, and quality credibility 2) Can use extensively for the bell ring and the music heavy play of the PHS, GSM the frequency and the band can remake according to the customers 3) Rated input: 0.5W 4) Max input: 0.75W 5) Frequency range: Fo - 20kHz 6) Resonance frequency: 800±20%Hz 7) Impedance at 2kHz: 8±15% 8) SPL at 1.0, 1.2, 1.5, 2.0kHz (0.1W/0.1m): 87±3dB