Infrared interactive whiteboard TechnologyInfrared TechnologyTransmission InterfaceUSB1.1/2.0/RS232Writing MethodFinger or a soft stickPower SupplyUSBUSB Cable5m standard, Can be extended to 30mPower ConsumptionUSB connection: 5±0.1V/330±10mA/0.165W 2.4G Blueteeth connection: 9V±0.1/500mA±5/4.5WResponse Speedfirst time:30ms, then 15msResolution4,096x4,096Positioning Tolerance≤2mmMountingWall-mount bracker/Portable stand/Projetor hangerCertificatesCE, FCC, ISO9001, ISO14001Operation LanguageEnglish, Chinese, ArabicOperation SystemWindowsWarrantyThree years upon registrationOptionalBlueteeh/Portable stand/Portable stand with projector hangerWorking Temperature/Humidity-10 to 60 celsius/20% to 50%Storage Temperature/Humidity-30 to 60 celsius/0 to 90%Working Altitudeless than 4,000 meters ItemIMS-BD-81Diagonal81''Proportion4:3Active Screen Area(mm)1,643x1,226Product Size(mm)1,800x1,310x48Packaging Size(mm)1,855x1,430x100N.W.(kg)22G.W.(kg)32pcs/20FCL84pcs/40FCL168