... mmColor: pink ,red,black,whiteFeatures:The Rechargeable Voice Amplifier adopts ABS engineering plastic, impact resistanceTone clearApplicable area of ... 400 square metersThis Portable Voice Amplifier gives you the freedom to move around your stage ... max5% maxFunctionWith USB,TF,MP3,FM radio,echoWith USB,TF,MP3,FM radio,echoMP3,microphone functionWith USB,TF,MP3,echo ...