Furthermore, the watch function on the device needs to be triggered by pressing the screen button as opposed to a traditional watch when time is always available to be read without needing to be triggered first. On that basis, it is clear that the ability of the device to keep time while attached to the user’s wrist is merely an ancillary function to the essential character, which is the ability to transmit data within a wireless network from your wrist to extend the range of features of the iPhone. IR3(b).