1. This projector is small and fully portable. 2. 1200 lumens brightness means a stunning picture, without the need for a screen. 3. Replace that old dusty monitor and play your favorite game on up to a 130 inch display. 4. With keystone correction, adjusting the picture trapezoidal distortion. 5. Wireless connecting with any smart phones under WIFI environment, you can enjoy anything on big screen at the same time. 6. For good sound, we recommend customer connect an external speaker Via the 3.5 mm headphone jack. 7. The USB port is only for U Disk / Hard Disk device connecting. 8. Newest processing system, provide stable, clear and beautiful images! A 20,000 hour bulb means you''''re new favorite party accessory can keep projecting music videos, images and clips for your friends for years to come.