Whether you are a hardcore adventure hiker, an avid runner, or simply looking tocount your doctor's recommended 10k steps a day, an Accelerator Series watch fits the bill. Advanced accelerometer technology provides highly accurate readings of a user's speed, distance, and caloric expenditure via a simple wristwatch sensor, eliminating the need for funny looking foot pods or belt clip sensors. Accelerometer technology is 95+% accurate, and much more dependable than traditional pendulum type (ball bearing) pedometers. GPS based running products are super-expensive, super-complicated, and aren't very reliable for indoor training or under heavy tree cover. The Accelerator Series is the perfectcombination of accurate readings, simplicity of use, and stylish design.