The Soleus GPS Pulse wrist based heart monitor measures your heart rate while on your wrist, no need for a chest strap. The unit allows you to customise 3 viewable lines of data that track your speed, distance, pace and heart rate. Set up to 6 interval timers, count calories and store and review your data for later review and upload to cloud services. GPS high sensitivity receiver, Distance (current/total in miles or kms). Pace/Speed (current/average in mph or kph), Heart Rate Monitor (wrist based Optical heart rate sensor), . HRM zones (personalised heart rate settings, 6 interval timers, calories, auto lap, data upload, data storage, large digits to easily read at a glance. Chronograph with 1/100 second accuracy, rechargeable battery, EL backlight for soft glow in low light conditions, Night Mode always on safety glow and 30m water resistant. Wrist monitor. Size H10, W10, D7cm. Weight 0.19kg. Rechargeable .