with USB/SD wired MIC/Guitar Input AC 185V~265V(50-60Hz) Frequency Range: VHF 210-270MHZ

Hot Active Portable speaker Q-8 A

Basic Function: with USB/SD, music EQ             adjustment, wired MIC/Guitar Input Power: AC 185V~265V(50-60Hz),one built-in            DC 12V/4.5AH rechargeable battery,            external DC 12V power inputFrequency Range: VHF 210-270MHZ                             one-driven-twoFrequency Response: 50Hz-18KHz±3dBMIC Effect: 25-50mWireless MIC: handheld MIC(plus25 RMB),                       headphone( plus 40RMB),           handheld MIC with priority, 75% of music          volume will fade automatically for background            music when speaking Power:50WSpeaker: 8 inch gamutSensitivity: 10dBμV(S/N over 60dB)Oscillation: Quartz Lock±0.005%Acoustic Quality: wooden case, wraped angle in metal 

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Popular trolley speaker Q-8A