iStyle Free Ultra Flex Colories Wellness Monitor Health Tracker Sensor for Fitness, Sleep & Stress (Soft Strap) Monitor how long and how well you sleep. Tracks steps, distance, calories burned and stairs climbed. Wakes you (and not your partner) with a silent alarm. Syncs automatically to your computer or select smartphones and tablets via Bluetooth 4.0 Slim, comfortable and easy to wear.IP65 protection grade(Protected from total dust ingress. & Protected from low pressure water jets from any direction.)