SunKni Full HD 1080P LED Video Projector Portable Multi-media Micro Home Theater Projector 800 Lumens Resolution 800*480 Contrast 800:1 White Multi-chip Coated Optical Glass Lens, With Keystone Correction And Lens Adjustment Mode Interface: Power Input, USB, HDMI, AV, Support SD Card, 3.5mm Earphone Applicable: Tablet, PC, Smart Phones, TV BOX, Digital Cameras, Laptops, DVD Players, MP4 / MP5, Game Consoles Professional trouble diagnose and protection and picture switch form 16:9 and 4:3 The short-focus design, 2M-&gt; 70-inch, 3M-&gt;100-inch