... performance, teacher guide and so on. Function:1,with USB,TF,MP3 input2,FM radio ... echo4,with LCD digital screen,size:30x22 mm5,with the function: calendar,alarm clock,showing ... song lyric,etc.6,with remote control Features:The Rechargeable Voice Amplifier adopts ABS engineering plastic ... ISO 9001 certificate Portable Multi-function Remote Control Megaphone GP955R