Technical ItemsTechnical Specification ModelTC-2079I Product Dimensions82inch(1630×1290×43mm) Writable Size74inch(1490×1160mm) Package Size1800×1480×145mm Temperature -10°c to50°c Humidity 30-80% Net Weight29kg Gross Weight42.5 kgFunction of projection of board Projection Size≤74inch Projection GainAvailable Viewing Angle170 degree in Horizon 160 degree in Vertical Surface MaterialWhite PVC panel,panel surface with the imported writing surface membrane(rewritable for general Kandelia)Electric Performance Induction WayInfrared induction The Induced ObjectsAny opaque object ,such as fingers ,pointers,ect Power InputUSB power supply(no extra power) Working VoltageDC 4.6V DC 5V Current Consumption< 1W,under voltage USB 5V ,current:<200mA Signal InterfaceUSB1.1 USB2.0 The Maximum Length USB Cable Can Support5m(10m:need to add a USB signal amplifier) Transmission Speed12M/s Anti-light IntensityUse under direct sunlight Scanning SpeedThe first point 25 ms, consecutive points 8 ms Cursor Speed180points / sec Display Resolution4096*4096(Depends on the actual computer and projector resolution) Depends on the actual computer and projector resolution4:3or16:9 Optional Accessories Wall-mounted AnnexIncluded Electronic PenIncluded Interactive Whiteboard Software Installation CD-ROM DriveIncluded TrolleyOptional Warranty1yea