DR. J Professional smart projector has built-in Android 11.0 system and over 4000+ apps, so you can watch streaming media online without a TV stick. This projector provides HD 720P resolution (supports 1080P and 4K decoding), with 7000:1 contrast ratio to provide you with vivid and excellent visual experience. With 2.4G/5G dual-band wifi, you will watch videos more smoothly and stably. The latest Bluetooth technology of the projector can easily connect to audio devices, and built-in high-fidelity speakers can provide clear sound. With the functions of automatic keystone correction and electric focus, you can quickly get a clear and aligned picture. Supports up to 170” display screen. Simple operation, suitable for people of all ages. It's a great assistant to build a home theater! You choose it, and you will love it!