Polar 625X Cyclocomputer/Heart Rate Monitor

"The world's first Running Computer to provide accurate heart rate, running pace and distance information right on your wrist. It delivers continuous running speed without relying on where satellites are positioned with the use of a special footpad that detects how your foot travels. With enhanced training tools and features like altitude and ascent for route profile, and the Polar OwnOptimizer recovery test-- the S625X let's you put the power of information to work for you. Also compatible with all Polar® cycling sensors to give you the ultimate training tool."