Powerful Speaker This mini projector has built in small cavity speaker, which puts the shocking sound into the small body, ultrasonic welding process, small body also has a loud effect. Wide Compatibility Small home movie projector, support U disk, mobile hard disk and other external storage devices. Can play sound, video, pictures and other files, support 1080P decoding. Short Focus Optical Lens Mini LED projector uses short focus optical lens, which can be focused at a distance of 60cm, adding image edge distortion correction to significantly improve image uniformity. Same Screen Push This projector supports phones with the same screen, easy to cast to the big screen, support computers, for Android and for IOS devices with the same screen, cell phone screen in seconds into a large screen. Professional Structure LED mini projector, large flux short focus lens, support double fan cooling, LED environmental light source, diffuse reflection imaging principle, light source length 20,000 hours.