KVM switch with Automatic Switching: To enable the automatic switching feature of the KVM switch, press Right [CTRL] twice, then [S], and [Enter]. The default auto-switching time is 10 seconds. (To turn it off, simply press this shortcut combination again). You can adjust the auto-switching time by pressing Right [CTRL] twice, followed by [S], then [N], and [Enter], where 'N' represents the number of seconds for the switching time (ranging from 1 to 999 seconds). Attention: If the switch's hotkey function conflicts with your keyboard's software which is rare, consider turning off the hotkey by using the front manual hotkey on/off button or switching to another keyboard. To disable the keyboard hotkey alone, press right [CTRL], right [CTRL], [K], [Enter]. You can then switch back to your first keyboard and still use the mouse wheel hotkey. HDMI Switch 4K - Supported resolutions: 480i, 480p, 720p, 1080i, 1080p, 2K@144Hz, 4K@60Hz RGB 4:4:4 HDR10, HDMI 2.0 compatible.Auto-Scan, auto-detection, auto EDID. Hot plug & play and HDCP. Multi-platform: support Windows 11/10/7/2000/XP/Vista, Linux, and Mac. Four computers one HDMI monitor - Controls 4 HDMI interfaced computers or other applicable devices using one keyboard, a mouse, one monitor with audio & microphone, and USB 3.0 HUB port. Hotkey - Tired of a manual button switch? This product gives you a convenient way to switch, Keyboard shortcut: press the right [CTRL] key twice, then press [1, 2, 3, or 4], followed by [Enter] to choose a computer. Mouse switching: double-click the scroll wheel, then click the [left mouse button] or [right mouse button]. The left mouse button will cycle through the computers in descending order (4, 3, 2, 1), while the right mouse button will cycle in ascending order. Digital Display- KVM Switch 4 port with a digital display which lets you easy to see the current channel even in the dark investment. Aluminum Alloy Shell - We use high-quality aluminum alloy to provide our customers with an excellent premium look, great drop resistance, lightweight design, strong build, and robust corrosion resistance. Attention: Please plug in all the cables included in the box; the four USB cables are for the front KVM USB ports. If you don't plug into your computers, your keyboard and mouse will not work. For audio, please select [USB Audio device] as the sound output option and then connect your speakers or headphones to the audio port.