1.Wireless Speaker Whiteboard 2.Own R&D software Free Customize 3.infrared touch3.Size; 82 96 105 4.Auminum material ,8 year 1) Advanced Infared Technology: Advanced International Infrared Induction Technology, contain advantages of electromagnetic induction ;without radiation ,2) Good Quality: honeycomb aluminum panel , special nano surface,support marker pen writing and erase, durable, not easy ...