... bluetooth MIC 3.lightweight:30g 4.laser,page up/down bluetooth wireless mini microphoneFeature:bluetooth wireless microphone 1.microphone hand free, ... 20003.sensitivity:86db4.property:2.4G MIC5.wireless 2.4G microphone6.2.4g wireless microphoneFunction:1.It has more than ... low battery,signal link,volume and so on.6. Remote electronic laser pointer,page turner, USB upgrading.7. Pen designed,instead of ...