Small But PowerfulOther larger Bluetooth adapters are often too large to remain installed without the risk of damage to the adapter or USB port or compromising functionality. The MANHATTAN Hi-Speed USB Bluetooth Micro Adapter - with its low-profile, miniaturized design - protrudes less than 5 mm (3/16 inches) from the installed USB port and can stay inserted even within the confines of a notebook computer backpack, briefcase or sleeve.