Speaker Microphone 1.Features:hand free,USB jack 2.Certificate:ISO9001:2000 3.Lightweight:30g 4.laser,page up/down Speaker MicrophoneFeature: ... bluetooth wireless microphone 1.microphone hand free,USB jack2.ISO 9001:20003. ... supply,low battery,signal link,volume and so on.6. Remote electronic laser pointer,page turner, USB upgrading.7. Pen ...