• Tracks steps, distance, hourly activity, active minutes and calories burned. • Water-resistant design suitable for swimming and showering. • Monitors sleep stages (light, deep & REM) and provides a Sleep Score. • Battery lasts up to 10 days on a single charge. • Tracks heart rate 24/7 to better measure calorie burn. • Provides call, text, and smartphone app notifications on your wrist. • Brand new condition, black band.