The Black Box SS4P-KM-U is a high-security NIAP 3.0 certified secure keyboard/mouse/audio switch designed for environments where data assurance and protection against cyber threats are critical. This rugged desktop unit enables one local user to securely control up to four connected computers using a single keyboard and mouse, while maintaining strict data isolation between systems. Built with advanced security technology—including opto-isolated USB channels, protected firmware, and anti-tamper safeguards—the SS4P-KM-U prevents unintended data leakage, unauthorized access, and malicious re-programming. Ideal for government agencies, defense operations, intelligence centers, and command-and-control applications, this switch integrates seamlessly with Windows, macOS, and Linux systems and supports USB HID devices and balanced audio switching for efficient, secure peripherals management.