We have covered plenty of wearable devices that track your sleep and activity. The Misfit Flash Link Smart Button happens to be an activity tracker that also lets you interact with your presentations, control your music, and take a selfie. It works with Spotify, Nest, Logitech Harmony, and other services. The device is lightweight and waterproof to 30 meters.
Flash Link has 12 LED lights to show how active you have been. It can also be used to turn your lights on/off. The device is available for under $20.