View Sonic's PJD7223 is a 4000 lumens & 15, 000:1 projector for medium-sized rooms that delivers clear, bright & sharp images with vivid & accurate colors, even in bright environments. This projector features Dynamic Eco technology to adjust lamp brightness, thereby prolonging the lamp lifespan, lowering power consumption & reducing the total cost of ownership. By pressing the "D. Eco" button on the remote control, the presenter can dim the screen to refocus the audience's attention to the presenter. Equipped with versatile I/O ports, the PJD7223 provides a flexible connectivity to a wide range of devices. The PJD7223 is integrated with a variety of functions & tools, making it a cost-effective option that efficiently & impressively upgrades your presentations.