The DW771USTi is the ultimate interactive ultra-short-throw projector for the education with 3500 lumen of brightness and WXGA resolution . The projector offers a 100 inch diagonal 2.15 metre wide projection image from as little as 44cm away from the screen surface. As well as delivering an optimal viewing experience, the DW771USTi ensures a high sound quality thanks to in-built 2x10W speakers. The DW771USTi supports multi-users with dual pen functionality and an optional Finger Touch Unit with 10 points. It is HID driver-free and, for further convenience, the interactive pen can be used like a computer mouse without the complications of installing a driver. This projectors it a robust alternative to flat panels when a 100 inch size screen is required.