ViewSonic PA503W WXGA Business Projector with 3,800 Lumens: PA503SW WXGA Business Projector with 3,800 Lumens Contrast ratio of 22,000:1 The technology of SuperColorTM Five color modes Automatic shut-off 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