• Port blockers help prevent unwanted thumb drives and other devices from connecting
• Can only be locked and unlocked with Tripp Lite U2BLOCK-A-KEY (sold separately)
• Compatible with all USB-A ports in computers, hubs and wall chargers

Block empty USB ports to prevent accidental or unauthorized connection of devices that could upload malware or copy private data.
Secure USB Port Blockers Protect Your Data Against Unauthorized Access These port blockers are an easy way to prevent unapproved personnel from connecting an unwanted flash drive or other USB peripheral to a USB-A port. Use a Tripp Lite U2BLOCK-A-KEY security key (sold separately) to insert a blocker into the USB port and lock it into place. This will prevent any USB peripheral from infecting the device with malware or removing classified data. The key also removes the blocker just as easily and quickly as it installs the blocker. The U2BLOCK-A10-RD includes 10 red blockers, which can only be used with the key included with U2BLOCK-A-KEY.