ViewSonic PA503SE SVGA Business Projector with 4000 Lumens: PA503SE SVGA Business Projector with 4,000 Lumens Auto-Switch Off Contrast ratio of 22,000:1 Technology of SuperColorTM Five color modes The Vertical Keystone Longer Lifespan To increase the lamp's lifespan, users can select different lamp modes. Without any signal input and with the Power Saving setting enabled, the projector will