The Model 4314 is Version 2.1 Bluetooth with data rates of up to 3Mbps. The Model 4314 incorporates a Class 1 radio with a range of up to 100 meters (330 feet) and is interoperable with Class 1, 2 and 3 Bluetooth devices. The 4314 is a miniature 'thumbnail' sized USB adapter which protrudes very slightly from the USB port. The thumbnail design protects the adapter and the connected USB port from damage due to impact. Other adapters extend significantly farther from the PC and an impact force can be magnified by leverage. That leverage increases the likelihood of damage to the adapter and the port into which the adapter is plugged.