... microphoneAmplification effect is goodEasy to use, can make MP3 playerWith USB,SD/MMC MP3 inputWith echo function Details: Color: black,pink ... ,made of pro-environment ABS engineering plastic Multifunction,with MP3,TF,USB input Which Amplifier is right for you? ... maxFunctionWith USB,TF,MP3,FM radio,echoWith USB,TF,MP3,FM radio,echoMP3,microphone functionWith USB,TF,MP3,echo,LCD screenHum and Noise50 ...