RF4 4K Ultra HD & 1080P HDMI USB Industrial Electronic Digital Video Microscope Camera With Recording Feature 1. The microscope is connected to the host computer through C/CS interface, and tightened to prevent falling; 2. HDMI connection to monitor. Display should support 3840*2160/1920*1080 resolution; 3. Use USB interface to connect computer for UVC camera; 4. Connect the power adapter to the host through the DC port. 5. The TF card can be used with related functions: taking photos, video recording, playback, etc. If necessary, please insert it; 6.Switch on the power adapter, and the host indicator shows green for 10 seconds. Tips: Hold down the ‘1080 key’ for 10 seconds to 1080P resolution. Hold down the ‘4K key’ for 10 seconds to switch to 4K resolution. Install and use: 1. The microscope is connected to the host computer through C/CS interface, and tightened to prevent falling; 2. HDMI connection to monitor. Display should support 3840*2160/1920*1080 resolution; 3. Use USB interface to connect computer for UVC camera; 4. Connect the power adapter to the host through the DC port. 5. The TF card can be used with related functions: taking photos, video recording, playback, etc. If necessary, please insert it; 6.Switch on the power adapter, and the host indicator shows green for 10 seconds.