Product 1. This device is suitable for TV, monitor, projector and other display devices with HDMI interface. 2. Support Apple/Android cell phone and personal computer same screen/projection, no need to switch 3. synchronize the small screen and big screen in the same screen mode, no router or data network is needed to use the same screen. 4. In cast (push) screen mode, after the small screen is cast to the big screen, you can exit the playback interface for other operations. Turning off or closing the screen will not affect the big screen to continue playing. And it doesn't consume cell phone data or cell phone power. 5. HD quality output to big screen, clear picture, sharp details 6. Support DLNA (push) function. 7. Support forGoogle forChrome casting function. 8. 8. Support forGoogle Home App. 9. 9. Support 5G/2.4G dual-frequency WIFI, set up WIFI networking through the button, which is simpler and easier to operate than other same-screen devices. 10. Support online upgrade.