Description
The SM20N-4 Secure 2-Port KM Switch is a certified peripheral sharing device designed to provide strong isolation between two host computers while allowing a single keyboard and mouse to control both systems. It enables direct connection of separate displays to each computer and securely shares keyboard, mouse, audio and USB devices. The unit is NIAP Common Criteria PP4.0 PSD compliant to meet strict security requirements.
Key features include secure peripheral sharing across different security domains, cursor-based seamless switching between systems, and support for multi-monitor configurations up to four displays per computer in duplicate or extended modes. The switch enforces multi-layered protections to mitigate peripheral exploits, information leaks, eavesdropping, signal transmission and malware. Built-in presets simplify common multi-display layouts and single- or dual-head systems.
Technically, the SM20N-4 provides two source connections and console USB ports for keyboard and mouse in Type A and Type B connectors. Power is delivered via an external 12V DC 1.5A supply with universal AC input 100 to 240V. The device operates reliably between 0° to 40° C and stores between -20° to 60° C while tolerating 0-80% RH non-condensing humidity.
Connectivity is straightforward – the console uses standard USB Type A and Type B connectors for keyboard and mouse and supports audio and USB peripheral sharing over the KM interface. Supported operating systems include Windows, Linux and Mac with advanced multi-monitor driver features currently available for Windows. Product certifications include CE, RCM, FCC class B, VCCI, TUV US and TUV Canada, and the unit is BAA and TAA compliant.
Typical applications include classified workstations where secure peripheral sharing reduces clutter while preserving domain separation, secure control rooms that require fast switching between hosts, and IT environments that need an auditable, certified PSD for sharing input devices. The switch prevents hardware and firmware tampering by enforcing strict isolation, making it suitable for government, defense and regulated commercial installations. It also reduces the need for duplicate peripheral sets and helps consolidate desk space.
Installation is simple and focuses on physical separation and secure connections – plug each host to its dedicated displays and connect console peripherals to the KM ports. The device uses an external power adapter and requires driver installation for advanced multi-monitor features on Windows. Built to a 10 year product life-cycle and backed by a 2 year warranty, the SM20N-4 is engineered for long-term secure deployment and straightforward maintenance.
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.
UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations. UPS Ground does not deliver on Saturdays, Sundays or Holidays.
USPS Priority Mail/USPS Express Mail
For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.
Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. AVProSupply has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.
International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.
Most items ordered from AVProSupply will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.
We Offer A 30-Day Money Back Guarantee:
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.
Refunds:
Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.
Exchanges:
If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.
No Returns/Exchanges on the following:
- TVs and monitors 20" and larger
- Special Order merchandise
- Any item indicated on the website as non-returnable
For more information see our official Return Policy
