This USB capture card captures HDMI audio and video signals, transmitting them to computers or smartphones for preview and storage. Suitable for high-definition acquisition, teaching recording, imaging, etc. Supports up to 4K input resolution and maximum output resolution of 1080P@30Hz. Features 1 HDMI input, 1 HDMI loop out for simultaneous watching and recording, 1 microphone input for talking while recording, and 1 channel 5mm stereo output. With 8/10/12 bit color depth, compatible with most acquisition software including OBS, VLC, Amcap. Supports Windows, Android, and OS X systems. Conforms to USB video UVC and USB audio UAC specifications. No external power supply required, small size and easy to carry. Included in package: 1 HDMI high definition video capture card, 1 USB extension cable, 1 instruction. Material: aluminium alloy. Color: as picture shown. Size: approx. 68x27x9mm/2.7x1.1x0.35in. Weight: approx. 107g. HDMI resolution: up to 4K input. Video input format: 8/10/12 bit color depth. Video output mode: MJPEG. Supports audio format: LPCM. Input cable length: ≤15m/49.2ft with AWG26 HDMI standard cable. Maximum working current: 0.4A/5V DC. Operating temperature range: (-10 to +55℃)