Description
The SM40N-4 is a NIAP Common Criteria PP4.0 certified secure KM switch designed to provide hardware-enforced isolation between up to four connected systems. It allows a single keyboard and mouse to control multiple computers while keeping inputs and data paths separated for security-conscious environments. The unit supports CAC authentication and secure audio handling for controlled peripheral sharing.
Key capabilities include seamless cursor-based switching, dedicated CAC port support, and shared USB keyboard and mouse connectivity. The SM40N-4 can handle multi-display configurations and provides explicit isolation to meet Protection Profile 4.0 requirements. Audio can be managed during switching to prevent unintended data leakage and to maintain security policies.
Technically, the switch supports four independent sources and uses USB Type A and USB Type B connections for keyboard and mouse peripherals. The device operates from a 12VDC 1.5A external power supply and accepts 100 to 240V AC input. It is rated for operation between 32°F and 104°F and offers a 10 year product life-cycle with a two year warranty.
Connectivity includes USB KM ports, a dedicated CAC port, and audio support as specified by model variants. The SM40N-4 is compatible with Windows, Linux, and Mac operating systems and meets multiple regional certifications including CE, FCC class B, RCM, VCCI, TUV US, and TUV Canada. The unit is also manufactured to BAA and TAA compliance requirements.
Typical deployments include government control rooms, defense operations centers, and secure enterprise facilities where consolidated peripheral control with strict isolation is required. The device reduces peripheral clutter while maintaining separate displays and input domains for each host system. Its certified security posture makes it suitable for classified or sensitive operations where protection profiles are enforced.
Installation and daily use are straightforward – mount or place the unit on a desk, connect the USB and display interfaces, and apply the external power supply. Cursor-based switching requires minimal configuration and the unit supports multi-monitor setups when drivers are installed on Windows hosts. The SM40N-4 is built for reliability with tested environmental tolerances and industry certifications that support long-term secure operation.
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
