75" interactive touch screen whiteboard for classroom/school

75" interactive touch screen whiteboard for classroom/schoolPlease see below for the product features, specification, functions, series we have, etc. Our company focuses on proving IR interactive products to customers and has rich experience on marking OEM/ODM products for many world-class brands. We own the leading IR touch technology in the industry.Product features:1. support multi language2. different sizes and frames for choice3. based on infrared touch technology4.