... laser pointer,MP3 play 5,LCD diplay classroom wireless microphones for teacher This model microphone is ... LCD display power supply,low battery,signal link,volume and so on.6. Remote electronic laser pointer,page ... this microphone is perfect. 2.4GHz emitter, microphone and processor are combined in this all-in-one unit ... 95.5*33.5*18(mm) classroom wireless hidden microphones for teacher audio/sound system