Introduction : Our 4K USB3.0 Video Capture can capture both HDMI video and HDMI audio. The HDMI loop-out function allows gamers to record their games while playing with no delay. Suitable for Gaming, HD acquisition, teaching recording, medical imaging and video production. It is the BEST Choice for you. Advantages : 1.Universal Compatibility. Support most acquisition software, Support Windows and MacOS system. 2.Support HDMI loop out without delay. Stable Capture; Smooth video and audio. 3.4K Full HD USB 3.0 High Speed Transmission. It supports Input and Output max resolution 4K @60Hz. 4.The capture card can realize screen sharing, fast, convenient & economical. 5.No External Power Supply Required, Compact and Portable; Easy to Use and Carry. Connection and Operation : 1. Connect the signal source and the HDMI input port of the USB acquisition card with one HDMI line. 2. Plug the USB male of the USB acquisition card into the USB port of the computer 3. Operation steps for USB video capture(OBS): Open the software ?Choose sources of “Video capture Device” ?Set the size of image ?Choose “Studio Mode”(double window) ?Choose “Start Recording”. Features : -Support HDMI loop out. -Support input & output max resolution 4K; -Support 8/10/12bit deep color; -Support AWG26 HDMI standard cable: input up to 15 meters, (1080P and below resolution); -Conform to USB Video and UVC standard; Conform to USB Audio UAC standard. -Dimension (L x W x H): 59x56x19 (mm) / 2.32×2.2×0.75 (in) Note Computer hardware configuration requirements CPU: PC i5-3400 or above; NB i7-3537U 2.0GHZ or above Graphics card: PC NVIDIA GT630 or above; NC NVIDIA GT735M or above Run memory: 4G RAM. Package Lists : 1 * Audio Video Capture Card with Loop Out 1 * USB 2.0 cable 1 * Micro USB power cable 1 * User manual.