[Original 1080P Ultra HD] The projector is equipped with 3800 lumens, 2500:1 high contrast and 16:9/4/4:3 aspect ratio. Color can improve the contrast of light and dark parts of the picture, presenting more detail, more realistic and natural colors, and giving you an extraordinary cinematic experience. [Wireless Connection Function] The C50 projector supports iOS/Android system WiFi connection and can freely play movies/videos/pos/games on the big screen from smart phones or other Miracast-enabled devices . [20 Keystone Correction and Zoom Function] Four-corner keystone correction (vertical and horizontal 20) to ensure clear images from any angle, giving you full high-definition visual enjoyment. You can enjoy 50-inch to 120-inch widescreen movies at a projection distance of 1.5-3m. [Multimedia Equipment Support] The C50 projector is equipped with multiple interfaces such as HDMI, USB, AV, headphones, etc. It can be received by earphone, laptop, DVD/VCD player, speaker, U disk, computer, PS3, PS4, etc. Projector System: LCD Panel + LED Lamp Native Resolution: Native 1920 x 1080, 1080p. Brightness: 3800 lumens Contrast ratio: 2500:1 Lens: manual focus Lamp: led lamp; 50000hours Interfaces: HDMI x2 / USB 2.0 x 2 / Composite AV / 3.5mm headphone jack (output) Aspect ratio 16:9/4:3 Image flip: 360 degree flip Projection size: 50"- 120" Projection distance: 1m-3m Projection method: front. Back. Ceiling mounting. table top Built-in speaker: yes Keystone: 20 OSD language English, French, Spanish, German, Italian, Russian, Japanese, Korean, Vietnamese, Chinese, etc.