Interactive whiteboard is a large touchable display working with a projector and computer, any projected image in the whiteboard can be operated by pens or fingers directly. It features 20 points Touch technology that enables multiple users to write and draw simultaneously. Users can switch seamlessly between writing, drawing and moving objects with a finger, stylus or even a pointer. The board easily connects to a computer via a USB cable. The board comes with anti-glare, durable and scratch-resistant surface. It's widely used for education and corporate presentation. Product Details Interactive Whiteboard IR Technology   20 Points Touch   Multi-user Writing ①Write by Finger/Pen ②Smooth writing ③Magnetic adsorption ④Easy to write & erase High Compatibility With USB power-plug, well compatible with all projectors and computers. Multiple Sizes with Customization Standard board sizes are 82, 96 and 105 inch. AlI other sizes from 50~ 140 inch are available to customize Aspect ratio supports 4:3, 16:9,16:10, 16:6.