The Activity Monitor can measure all the movements you make.
These measurements are combined with your age, gender, height and weight. They are then converted to the calories you burn in each activity.

The Activity Monitor is based on the Philips Tracmor, which was developed by Philips Research and Maastricht University.
According to a review in Obesity 2007, a scientific journal, the Tracmor is extremely accurate in measuring an individual's daily energy expenditure.

The Activity Monitor is unobtrusive and waterproof.
Whether you wear it in your pocket, as a necklace or on your belt, it doesn't get in the way. The Activity Monitor is waterproof so you can take it with you while you swim.

With the Activity Monitor, keep track of your activity levels wherever you are.
The indicator lights on the side start each day showing zero activity, indicated by a single green light. Each additional green light brings you 15% closer to your daily 100% activity target.