... is used . 7. 6.3mm wired mic jack System specifications : Wireless PA System Speaker4 Ohm 12 Inch Woofer Frequency Band VHF 174 ... Time Average of 2-6 Hours depending on volume , and use of componentsPower Supply AC160-260V(50-60Hz) ,DC ... -speaker, recorded, play) *Teaching, Conference, classroom, military training, guide, sales promotion, public sale's loudspeaker recorder play. *Pageant, congregation ...