... FM radio,MP3,MP4.USD SD MMC CARD.Built-in dual channels UHF wireless microphone receiver portable PA amplifierMade of good quality ABS ... FM radio,MP3,MP4.USD SD MMC CARD.Built-in dual channels UHF wireless microphone receiver,up to 100 meter distanceBuilt-in ... full-range high efficiency 8" loudspeaker.4.Dual channels Wireless Microphone5.Frequency Response: UHF 500-600MHz6.Sensitivity:10dBuV(S/N up to ...