... Multifunction,with MP3,TF,USB input Which Amplifier is right for you? Compare models below.ModelHTY-GP955HTY-GT966HTY-G268 HTY-GP998 Max Power20W Portable ... USB,TF,MP3,FM radio,echoWith USB,TF,MP3,FM radio,echoMP3,microphone functionWith USB,TF,MP3,echo,LCD screenHum and Noise50 dB ... )Still have questions? Do not hesitate to ask for advice and inquiry. Package Included:1 x Host1 x Microphone1 x Belt1 ...