Mio Drive Petite Women's Heart Rate Monitor Watch Wristwatch-style HRM provides ECG accurate heart rate without a chest strap Calculates percentage of maximum heart rate based on personal data to help you gauge your exertion levels Full featured sports watch with time, date, chronograph, alarm and back light Five exercise timers--Count up, Count down, Count up with warm-up, Walk/Run and Repeat Interchangeable watch bands in a variety of colors sold separately; 1-year warranty