Wireless Microphone 1.lapel tie clip,headworn,handhold 2.ISO9001,LED display 3.property:compatibility 4. ... the teacher in, it works at the same time. 2.MIC type:External microphone.3.Size:Small size,easy to use ... and manage.4.Digit designed,instead of any other MIC.5.LED display charging status,balanced battery,volume.6.Page ...