Tripp Lite U2BLOCK-A-KEY USB-A Port Blockers with Reusable Key, 4 Pack

Block empty USB ports to prevent accidental or unauthorized connection of devices that could upload malware or copy private data. Port blockers help prevent unwanted thumb drives and other devices from connecting Can only be locked and unlocked with included security key to ensure protection Includes 4 blockers&mdash,3 store conveniently inside the key for safekeeping Blockers and key must be used together for security purposes Portable pocket-sized key and blockers are compatible with all USB-A ports