<p>Big Screen Magic, Anywhere You Go！</p> <p>DR. J Professional smart projector has built-in Android 11.0 system and a newly upgraded chip. You can download more than 4,000 apps and watch more than 1,000,000 movies online. The projector has a native 720P resolution, and supports 1080P &amp; 4K movies. It supports up to 250-inch display screens, giving you the ultimate giant screen viewing experience! With dual-band 2.4G and 5G WiFi, online viewing is smooth, stable, and without delay. The projector has automatic keystone correction and electronic focus, and you can get a perfect picture in just 2 seconds! Built-in Bluetooth 5.2, you can easily connect to external speaker devices to upgrade the sound quality! Easy to operate, worry-free after-sales guarantee, it is a good assistant for building a home theater!</p>