Bright WXGA DuraCore laser projector - 3600 lumens and IP6X certified. Ultra compact with short throw lens for easy installation - 360-degree and portrait projection. Reduced power consumption for a long life span - DuraCore laser technology delivers 30,000 hours maintenance free laser light source. External power supply - More reliability, portability and energy efficiencyThe ZW350ST is one of Optoma's most compact and hassle-free WXGA DuraCore laser projectors to date. Designed for maintenancefree continuous operation, this 3600-lumen projector delivers powerful image performance with flexible installation features and extensive connectivity options in a sleek, compact form factor, up to 34% smaller than previous Optoma models. An added benefit, the ZW350ST features an external power supply offering more reliability, portability and energy efficiency.