4-port, dual-video 4K/60 HDMI KVM switch 

with audio support and USB 2.0 peripheral sharing, to access and control four HDMI computers from a single USB keyboard/mouse and two HDMI monitors 

SM-UHN-4D is a KVM switch capable of managing four HDMI computers through two HDMI monitors, one USB keyboard/mouse, and a set of speakers, while sharing USB peripherals like printers, memory devices, scanners, etc.

SM-UHN-4D supports resolutions of up to 4K Ultra-HD (3840x2160 @ 60Hz).

SM-UHN-4D KVM switch allows the control of four computers via a single console set of USB keyboard/mouse/hub, speaker and 2x HDMI displays. SM-UHN-4D KVM switch has a built-in USB 2.0 compliant hub that allows sharing of the USB peripherals, along with 3.5mm stereo ports for speakers.

The switching between the connected computers is executed by using the front panel or keyboard hotkey commands. Product set-up is quick and simple with no software to install, so you're ready to go right out of the box.

Flexible Sharing
SM-UHN-4D supports independent simultaneous device selection. It enables the use of a USB keyboard and mouse on one computer while other USB peripherals such as scanners and printers are connected to the other computer source. SM-UHN-4D maintains the ability to switch all connected devices to any one of the computer sources as with any other KVM switch on the market.

Features and Benefits
• Supports all major Operating Systems like Windows, Mac, Linux, Sun, Unix, DOS, etc.
• 4K Ultra-HD resolution – supports up to 3840x2160 @ 60Hz
• Zero pixel loss with TMDS signal correction
• Supports USB keyboard and mouse
• Supports additional USB 2.0 devices like printers, scanners, web cameras and more
• Flash upgradeable firmware
• Stereo speakers support
• Front panel keys for manual port selection
• Hot-key commands for quick port selection
• RS-232 for remote control
• Independent (asynchronous) switching of KVM and peripheral USB/audio ports - users can listen to audio from one computer while working on a different computer, or scan a document and save it on another computer
• Complete keyboard emulation for error free booting

Package Includes
• SM-UHN-4D switch
• Power adapter [PS12VD2A]
• 3.5 mm to DB-9 serial cable [CC35DB9]
• KVM cables are not included - see listing below for compatible HDMI KVM cables required per computer port

Required cables (per port)
2x HDMI cable, male-male
1x USB Type-A to Type-B cable, male-male
1x 3.5 mm audio cables, male-male