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Products>>>Speaker>>>Telephone speaker       Diameter: Cone Material: Edge: Nominal Power: Maximum Power: Impedance: Voice coil: Fo: Response: S.P.L: Magnet Size: Net weight:       Φ45mm       Paper       Paper       0.25w       0.5w       8±15%Ω       Φ13.3mm       650±20%Hz       Fo-4.5kHz         88±3dB/1.0W/0.5M         Φ12.5×3(NdFeB)       12.5g