iStyle Free Health Tracker Wireless Activity Plus Sleep Tracker Smart Colories Distance Monitor - Retail Packaging Syncs automatically to your computer or select smartphones and tablets via Bluetooth 4.0 Monitor how long and how well you sleep. Wakes you (and not your partner) with a silent alarm. Slim, comfortable and easy to wear.IP65 protection grade.(Protected from total dust ingress. & Protected from low pressure water jets from any direction.) Tracks steps, distance, calories burned and stairs climbed.