The DWU960STA-iS comes equipped with a 0.65-0.75:1 fixed short throw zoom lens. Both projectors offer 24/7 operation an IP5X dust-resistant optical engine a motorized zoom lens and whisper-quiet operation. The DWU960STA-iS is professional-grade choices for boardrooms classrooms and other small-to-mid-size environments that won't break the bank. Both laser illumination systems offer up to 20000 hours of reliable virtually maintenance-free operation for a low total cost of ownership.