Clear Pictures & Eye-Friendly: This projector uses an exclusive innovative optical system and high quality optical lens made by a Japanese company. The lens uses multiple glass lenses with a high refractive index. The focus of the lens is accurate and the edge and center of the image are 100% in focus, preventing the eye from compensating for the focus. Therefore, the projector can be focused properly and it’s good for the eyes at all! Sealed Dustproof & Portable HD Projector: The unique design of the sealing elements prevents airborne dust from entering the projector. The sealed projector does not create black spots on the projection surface that affect the viewing experience. High resolution native 1920x1080P, supports 4k via HDMI, 10000: 1 high contrast, 98% (NTSC) colors are richer and more realistic. This projector weighs only 1.45 kg, which is very light and portable. WiFi & Wireless Sync: The portable outdoor projector can be connected to IOS / Android. Android phones don’t need to be connected to WiFi. Turn on the wireless projection function of the Android phones and turn on “Miracast” of the projector to sync with the Android phones. The IOS mobile phone activates “Screen Mirroring” and connects to the same WiFi with the projector to realize the same screen display. Adjustable Brightness and Contrast of USB / HDMI & ± 25 ° Vertical Keystone Correction & Zoom Function: When connected via HDMI and USB, brightness and contrast are adjustable. When the projector is playing a video, you can click the menu button on the remote control directly (the menu button is a button with 3 horizontal lines) and then enter the settings, you can choose a variety of modes. The projected image can be scaled (100% -50%).