digital echo karaoke amplifier size:83*81*38MM FUNCTION:USB,ECHO,MP3 PLAY, ... CARD certificates:ISO,CE,FCC,CB PARAMETERSPECIFICATIONADVANTAGESITEM NO.digital echo karaoke amplifier waistband amplifierCOMPONENTS1.CHARGER 2.HEADSET MIC. 3.MAIN UNIT ... . CBM:0.0640HQ(68CBM):1133CTNS4. G/W:13KG digital echo karaoke amplifier