The Optoma UHZ45 uses a laser, not a lamp, for superior brightness, crisp, accurate color with an incredible 2,000,000:1 contrast ratio, instant on/off, and a life span of up to 30,000 hours. 4K Ultra HD resolution with 240Hz refresh rate support at 1080p and an ultra-low 4ms response time make the UHZ45 a great choice for cinematic immersion and fast-paced gaming. Setup is fast and flexible, with smart features like four-point geometric correction and adjustment for wall colors. And, for an audio experience to match, take advantage of the eARC support to connect compatible home theater speaker systems.