Lens: glass lens Display Technology: DLP Resolution: 1920*1080 dpi (support 4k decoding) Brightness: 19000 Uniformity: above 98% Color Gamut: >=120% NTSC Contrast Ratio: 25000:1 Projection Size: 20~300 inch Off-Axis Shift: OFF-SET: 100% Throw Ratio: 1.2:1 (76" at 2 megapixels) Electronic Keystone Correction: With automatic keystone correction function, vertical ( +/- 40 degrees), the proportion of the image is not distorted after adjustment Projection mode: front projection, rear projection, ceiling mounting Input / output port: HDMI 1.4 * 1, SD slot * 1 , USBx2, earphone*1, DC 15V2A, wifi, Bluetooth Multimedia performance: Audio (audio format): MPEG1/2 Layer1/2, LPCM/ADPCM, MP3, DD+, AAC, HE-AAC, WMA Video (video format) : VP6, VP8, MVC, VC1, Divx3/4/5/6, Xvid HD, FLASH7/8/9 (.flv), AVS, HD, MPEG-2, MPEG-4, H.246, RM/RMVB, full support for u format up to 1080p Standard accessories: power adapter, remote control Speaker: built-in Hifi audio Noise: