Dynamic Mini Receivers Model No.: MR1050 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 Receivers (May 16, 2006) Detailed Product Description Features: 1) This product is super miniature designed, and clearly sound quality, bass effect and the high SPL, wide-band, function stability, and quality credibility 2) Can be used extensively for PHS, GSM and the blue tooth headset 3) And the frequency can make to order according to the customers 4) Rated input: 10mW 5) Max. input: 20mW 6) Frequency range: 300 - 3,400Hz 7) Impedance at 1kHz: 32±15% 8) SPL at 1kHz (179mV): 112±3dB