[Original 720P HD] The C9 projector is equipped with 2800 lumens, 2000:1 high contrast and 16:9/4/4:3 aspect ratio. The advanced color enhancement technology can improve the contrast between the light and dark parts of the image, presenting more details, more realistic and natural colors, and giving you an extraordinary cinematic experience. [Wireless Connection Function] The C9 projector supports iOS/Android system WiFi connection and can freely play movies/videos/photos/games on the big screen from smart phones or other Miracast-enabled devices . C9 projector's built-in Bluetooth can freely connect to your Bluetooth headphones, Bluetooth speakers and airpods at any time Keystone correction 20 and zoom function Built-in stereo speakers built-in speakers, independent sound cavity, more real and three-dimensional sound [Support for multimedia devices] The C9 projector is equipped with a variety of interfaces, such as HDMI, USB, AV, VGA and headphones, which can be received through headphones, laptops, DVD/VCD players, speakers, USB disks, computers, PS3, PS4 etc. Model: C9 Material: ABS Brightness: 2800 lumens Native resolution: 1280*720P Support resolution: 1080p Display type: LCD Aspect ratio: 16:9/4:3 Contrast 2000:1 Bid: 1.41:1 Image Size: 50-280 inches Projection Distance: 1.8-10m Keystone: Yes Keystone: 20 Projection: Front, Rear, Center, Desktop Interface: HD 1, HD 2, USB1, USB2, VGA, AV three in one, 3.5mm audio output Menu languages: English, French, Spanish, German, Italian, Russian, Japanese, Korean, Vietnamese, Chinese, etc.