1.3 IN 1 OUT HDMI SWITCH: HDMI switch with 3 input ports and 1 HDMI output, compatible with most devices. No more plugging and unplugging HDMI cables—simply switch between 3 devices with one button for seamless work and playback. 2.Note: Limited to certain devices. If your HDMI port doesn't provide sufficient power for the switch, you'll need to connect all three source devices to the input ports. Only one output device can display images at a time; simultaneous display on two devices is not supported. 3.Synchronous HD Transmission: Supports HD audio and HDCP compliance, featuring speed HDMI 1.4b specification. Delivers resolutions up to 4K@30Hz (2160P) without audio/video distortion or signal delay. Compatible audio formats: LPCM, Dolby AC3, DTS, Direct Stream Digital. 4.4K Resolution: The HDMI switch supports 4K 3840*2160@30Hz and 3D display, offering Ultra Full HDR resolution. For performance, use a quality HDMI cable (under 8 meters) and set your TV display to HDCP 1.4/1080P resolution.