We are supplier of different speaker, audio speaker,raw speaker, speaker, paper cone speaker, micro speaker,video speaker We are professional supplier of different speaker, audio speaker,raw speaker, speaker, paper cone speaker, micro speaker,video speaker,best speakerDimension: 28mmNorminal impedance:(8)+15%ohm at(1000)hzSensitivity(S.P.L):89+3db (1W/1M)Resonantfreq: (500)+20%HZ measure at (1) ...