Tripp Lite USB-A Port Blockers with Reuseable Key, Red 4-Pack - for USB Port - 4 / Pack

Includes 4 blockers-3 store conveniently inside the key for safekeeping Blockers and key must be used together for security purposes 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 This product is covered by a Lifetime Limited Warranty Portable pocket-sized key and blockers are compatible with all USB-A ports