Model DS-9089HD Projection Gain Available Viewing Angle 170 degree in Horizon 160 degree in Vertical Surface Material PET material/Matt surface Induction Way Electromagnetic induction Power Input USB power supply or 100-240VAC,50/60HZ AC Current Consumption =100mA(USB power supply, no extra power) Signal Interface USB2.0 The Maximum Length USB Cable Can Support 20m Transmission Speed 12M/s Anti-light Intensity Use under direct sunlight Scanning Speed The first point 25 ms, consecutive points 8 ms Cursor Speed 180 points / sec Display Resolution 4096*4096(Depends on the actual computer and projector resolution) Display Ratio 4:3 Wall-mounted Annex Included Electronic Pen Included Interactive Whiteboard Software Installation CD-ROM Drive Included Trolley Optional 1.Electronic Classroom Optional 2.Interactive Meeting Software Optional 3.Exhibition,Exhibition Dedicated Software. Product Dimensions 87 inch (1795í-1315í-26mm) Writable Size 79.5 inch (1635í-1205mm) Package Size 1880í-1480í-130mm Temperature -10íµto50íµ Humidity 30-80% Net Weight 17kg Gross Weight 27.5kg Projection Size í_79.5inch Warranty 3 years.