... This amplifier speaker is suitable for on-stage performance, teacher guide and so on. Function:1,with USB,TF,MP3 ... calendar,alarm clock,showing song lyric,etc.6,with remote control Features:The Rechargeable Voice Amplifier adopts ABS engineering plastic, ... without distortion.Details: With mini remote control Package Included:1 x Lithium Battery1x Remote control1 x Amplifier Speaker1 x Microphone1 ...