Fangrui Product Details 1) 270 Flexible Angle 2) Latest Android 11.0 Os 3) Support 4k Max 4) Wifi Display For Laptop/smartphone/tablet 5) Stereo Sound 5w*1 System: Android 11.0 Os Focus: Auto Focus 8d : Automatic Vertical Correction Support Ac3 Wifi: 2.4g/5g Wifi 6 Bt: Bt5.0 Cpu: Mt9255, Ca53*4 Cores, 4k 60hz Avs2/265 Gpu: G31 Mp2 Memory: Ram 1g Ddr3, Rom 16g Screen Wireless Push: Airplay/ Wifi-display Play Store: Download And Install App Language: 23types, , Danish, German, Greek, English, Spanish, Finnish, French, Croatian, Hungarian, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Romanian, Russian, Slovenian, Belarusian, Vietnamese, Chinese, Traditional Chinese Optical Parameters Display Technology: Lcd Led : 30,000 Hours Brightness:380ansi Lumens. Resolution: 1280x720p Real Full Hd Contrast Ratio: 5000:1 Aspect Ratio:16:9/4:3 Projection Screen Size (inch): 30-200 Inch Projection Distance (m): 0.9-5.8 Meter Throw Ratio: 1.31:1 Correction: Vertical: +/-15deg, Smart Version Support 6d (horizontal, Vertical, Corner C