USB-XL Dongle Lockbox - protect expensive USB dongle keys from loss or theft. Capacity 2 USB devices (customer must supply second USB extender cable) 4-digit combination lock protects your USB dongle. Unlock, plug your USB Device into the extender cable and plug the cable into your computer. Unlatch the steel cable and loop around a tab on your PC, a desk drawer handle or other stationary object. Snap the cable in place, insert the lock into the case and spin the combination lock to secure your USB device. Optional Anchor Kit available to create a solid anchor on any flat surface.