The Misfit Flash is a sleek fitness tracker that measures the activity level and sleep patterns of the user. Thanks to its modular design, it can be worn flexibly as a wristwatch, key ring or it can be clipped to the user’s clothes. The front face is a button, which, when pressed, displays a hidden array of LED lights that indicate fitness progress and time of day. The button can also be used to play and stop music, control connected lights or send quick messages to friends.