From the ManufacturerPortable notebook lock for the mobile professional. MicroSaver Retractable combines premium notebook security with an easy-to-use design. A patented T-bar lock helps to safely secure your notebook, while the slim yet strong 4-foot cable fits neatly into a compact, easy-to-carry case.Features and benefits:Retractable, portable security cable lock Easy-to-retract cable delivers portability, mobility and security Case provides carrying convenience and security loop Compact lock will not block other ports Patented T-bar lock ensures superior locking strength Strong, slim, 4-foot cable stows in easy-to-carry case Attaches to built-in Kensington security slot System Requirements: security slot (will work on any device with slot adapter) Backed by the Kensington 1-year warrantyAmazon.comThe Kensington 64053 Micro Saver Portable Notebook Lock is a portable laptop lock that has been specifically designed for the mobile professional. The lock is constructed of a slim, four-foot steel that is retractable for both security and convenience, and a patented, T-bar lock that provides superior lock strength and theft protection. Easy to install and use in the office or when traveling, this system locks into the standard Kensington security slot found in 99-percent of notebooks, as well as many flat-panel monitors, CPUs, projectors, printers, docking stations, tablet PCs, and other devices. This unit features a sleek styling and design that won't block notebook ports or lift a notebook off the desk, and a compact, easy-to-carry case that provides carrying convenience and a security loop, and has easy, push-button retraction for the security cable. The Kensington 64053 includes two keys, with replacement keys available through the manufacturer, and is backed by a manufacturer's one-year warranty.