[BYINTEK K20 Full HD 1080p Resolution] BYINTEK K20 has 1920*1080 dpi native resolution, 15000:1 and 500 ANSI contrast ratio, which can provide clear and delicate high-definition images to ensure the best video experience. [Wireless WiFi Connection] The latest WiFi connection function is compatible with smartphones. You don't need to turn the cable into a troublesome thing, you only need to establish a WiFi connection once, as long as you want to use it, you can connect the device to the projector. [Bluetooth Speakers and Surround Sound] Built-in stereo surround sound speakers restore the sound effects of every detail, allowing you to enjoy pleasant sounds in different scenes. With Bluetooth, you can wirelessly connect your ideal Bluetooth speakers at any time. [Compatible Equipment] This portable projector has a wide range of uses and has HDMI, AV, VGA, SD card ports, and can be used with laptops, PCs, TVs, TV Sticks, Roku, Chrome Book , tablets, Blu-ray DVD players, MICRO SD card, USB key, multimedia player (music, image, video), smart phone. Optical parameters Display technology: LCD LED life: 30,000 hours Brightness: 500 ANSI lumens. Resolution: 1920x1080 Real Full HD Contrast ratio: 15000:1 Aspect ratio: 16:9/4:3 Projection screen size (inches): 50-300 inches Projection distance ( m): 1.7~9.2 meters Throw ratio: 1.35:1 Keystone correction: vertical: +/-15deg Zoom: electronic remote zoom Interface Input: USB, SD, HD*2, VGA, AV Output: 3.5mm earphone (USB interface support read data from USB SSD hard disk) Other hardware Speakers: 4, 5W x1 Power consumption: 150 W