... usb headset 3,page turner:page up/down 4,laser pointer,MP3 play 5,LCD diplay classroom wireless microphones for teacher This model ... ; It has many many functions which is the perfect for teacher use !Function:1.Multichannels:It has more than 1000 channels ... link,volume and so on.6. Remote electronic laser pointer,page turner, USB upgrading.7. Pen designed,instead of any other ...