Portable Overhead Projector CE/UL/CSA authorized by SGS CSTC Dual Lamps switcher Portable Case Projection Stage: 285x285mm, suitable for A4 transparencyPower Supply: 220V/50Hz (optional 110V/60Hz)Lamp: Dual Sockets/Dual Lamps Halogen 24V/250W (EHJ)Projection Lens: 3-element varifocal lens f=280-340mm Cooling low noise dual cross flow fanNoise under 30dB, warm air elimination through cooling bafflesOverheating protection Dimensions: 420x320x475mm Folding dimensions: 420x320x110mm Net weigth: 5.7kg