1. .The HDMI 2-in/1-out KVM switch allows you to connect two computers' HDMIThe HDMI 2-in/1-out KVM switch allows you to connect the HDMI and USB signals from two computers to the switch, enabling two computers to share one monitor and a keyboard and mouse.This allows two computers to share a single monitor and a keyboard and mouse at the same time! Suitable for offices, server rooms, surveillanceThe switchers are suitable for offices, server rooms, surveillance units, etc.! And you can switch freely via the button!2. Functional features. Supports two HDMI and two USB inputs; one HDMI output. Support for mouse and keyboard input. Support USB2.0 for USB stick printer, etc. Compatible with HDMI 1.4b, HDCP 1.4 and DVI. Video resolution up to 3840*2160 @30Hz Audio formats supported are LPCM2/5.1/7.1CH, Dolby 5.1CH. Built-in ESD protection. Audio output can be selected from any input source.