86 inch ir iwb interactive school writing board with wheels Usb infrared touch screen 17'' to 220'' The main features: 1. Single touch or dual touch or four touch; 2. Support linux & mac os & win7 multi-touch & microsoft surface 3. Any solid untransperant objects can be used on the board; 4. No light spots, to protect user¡¯s eyes; 1 piece per packing, carton and wooden case
