... :CD/PC/MP3,professional classroom audio solutions 2.Amplifier,receiver,loudspeaker 3.Power:2*50W,6.5inch active speaker 3 ... Linking time: The receiver connect with transmitter in just 3 seconds.6. Loudspeaker type: wide-band horn.7. ... .8. Input: Two MIC input,a line CD/MD/PC audio input,a line recording output. ... Treble :10Khz±12db,6.5"*1Bass:100Hz±12dB,3"*1S/N Ratio≥80dBPower SupplyAC 220V±10%/50HzChannel ...