• 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

• Interchangeable watch bands in a variety of colors sold separately

• Backed by 1-year warranty

Superior MIO technology gives ECG accurate readings without a chest strap - Now the most compact heart rate monitor on the market! Exercise safely and effectively with visual exertion level indicators and % of max heart rate. Full-featured sports watch with date/time/calendar, alarm, 2 timers (count-up and count-down), chime, backlit display. Water-resistant to 30 m. User-accessible battery hatch ¿ no tools required. Features MIO's signature interchangeable straps (additional petite bands sold separately)