Misfit Wearables Flash - Fitness and Sleep Monitor (Red) Splashproof disc with red LED progress and time display Smart button enabled to control connected household devices Automatically tracks steps, distance, calories, and light and heavy sleep Flash Cyclist is water resistant up to 30m and suitable for everyday use. This means splash/rain resistant, NOT suitable for showering, bathing, swimming, snorkeling, and similar water work. Wirelessly syncs with paired smartphone to upload data and Non-charging, replaceable battery lasts up to 6 months