Given the functionality of the device as outlined in the goods description, it is clear that the component that gives the device its essential character is the capacity of the device to communicate with an iPhone and other devices. Quite simply, the purpose of the device is to extend the range of functions accessible to the user by giving access to iPhone functions from the convenience of the user’s wrist. As a wearable piece of technology, the essential character of the device is the ability to enhance the functionality of the iPhone through wireless communication.