【Presentation and Annotations on Document】smart interactive whiteboard come with 2 pack of stylus, we can smoothly write and precise annotate for the file or picture which were cast on 55-inch display from your phone or tablet computer 【Wireless Document Sharing and Screen Cast】quickly and efficiency cast documents on smart interactive whiteboard, make annotations and conclusion after brainstorm, then share our ideas or document to lesson participant by scan QR code. 【Broader Visual Angle and Sharper Definition】electronic interactive white board feature with 4K UHD touchscreen which has a wider angle view up to 178 degree, anti-glare design provide better visual experience, and 4 mm tempering glass protect it well 【 Better Expression and Higher Collaboration 】The interactive whiteboard display support real-time video meetings (camera sold separately), be convenience to connect team in different located, express and share ideal on same line 【All in One 4K Smart Interactive White Board】JAV presentation electronic white boards integrated the whiteboard, projector, display screen, canvas, television into one. Ideal solution for school, business, home. improve work efficiency