The OPTOMA's UHD50X XPR 4K UHD DLP home theater projector with 2400 lumens of brightness overpower ambient light, while its 500,000:1 dynamic contrast ratio enhances detail in dark sections of the image. To support a range of sources, the UHD50 offers one VGA and two HDMI inputs. Both HDMI inputs are MHL-compatible, allowing user to connect mobile devices like a smartphone or tablet, and the projector has a USB power output to help user save battery life on device. Its analogue audio input and output allow to use the built-in 5W speakers or send your audio to an external system via the optical audio output, which connects to receiver or soundbar via digital audio.