Under Armour Health Box The Under Armour Health Box is your interlinked fitness system. The band tracks your sleep, monitors heart rate, counts your daily steps & monitors the intensity of your training. The scale can be used to help you reach your goal by tracking body weight & body fat. The heart rate monitor in the form of a chest strap keeps a record of your heart rate while you train. Product Features Your UA band will count your steps, measure your sleep & even notify you when you have been inactive too long. Once the band is synced with your phone you can receive notifications & have music control. Your UA scale will measure your weight & body fat. The scale can have up to 8 users data stored. Your UA heart rate monitor provides an accurate heart rate reading & measures training intensity. The monitor is snug & comfortable & water resistant., size ONE SIZE