1.Wireless speaker & wireless microphone 2.Wireless writing 3.infrared multi touch 4.Manufacture 5.material : Aluminum 1) Advanced Infared Technology: Advanced International Infrared Induction Technology ... , ROHS ,FCC, International Standard Product,etc3) Wiress Connect PC & Whiteboard, wireless bluetooth microphone4)Built-in Stereo SpeakerIt built in stereo speaker ...