This product is a portable high-definition video capture card that can capture high-definition audio and video signals, transmit them to mobile phones and computers for preview, editing, storage, and live broadcast, and output computer videos to external monitors and other multi-functional applications. It can use for macOS, windows and linux operating systems, and supports USB and Thunderbolt interfaces. The table below shows the bandwidth required to capture each different channel. Video Resolution： SDI IN Standard : SMPTE424M, SMPTE292M, SMPTE259M 576i 720p 1080i 1080P(25/29.94/30/50/59.94/60) HDMI IN :1.4V 576i 720p 1080i 1080P (25/29.94/30/50/59.94/60) 3840x2160P(30) HDMI out :＜4K30 （Only available when connect to USB4.0 or thunderbolt port ） Analog audio : 48K stereo Capture : YUV2/MJPG <4K18P USB Extension: USBA 3.0 10G TYPE C : Compatible with USB3.0 USB4 Thunderbolt Power consumption: <5W Precautions for use 1.The computer software video frame rate, monitor frame rate, and camera frame rate must be consistent to ensure it works smoothness. 2.In computer graphics settings, run software settings on a high-performance graphics card whenever possible. 3.Set your computer to high-performance mode and turn off energy-saving options.