ASUS S1 200 lumen HDMI/MHL Built-in 6,000mAh Battery Power Bank Short-Throw LED Pocket Projector Built-in 6,000 mAh rechargeable battery delivers up to 3-hour projection time and doubles as a power bank to charge your mobile devices Advanced DLP Technology with 30,000-hour LED lifespan, 200 lumens brightness, 854x480 native resolution and big screen size up to 100 inches (in low-light conditions) Palm-sized and .75 pounds lightweight for maximum portability with the best-in-class 1:1short-throw ratio. HDMI/MHL port ensures compatibility with a variety of sources, USB port for charging only. Built-in ASUS Sonic Master enhanced-speaker for authentic sound reproduction To connect with iPhone/iPad(Lightning port only), purchase separately the Lightning Digital AV Adapter from Apple. To connect with Samsung devices, purchase separately a Samsung specific MHL cable(5 pin to 11 pin) for video output. True Resolution (native): WVGA(854x480) Throw Ratio: 1.1