You have the courage and the desire to face the extreme, endure the toughest competitions and compete with nature's most unforgiving forces. You need the most powerful, most personal, most dedicated tools to give you the edge. With the Polar AXN700 we have added the heart rate rest test to determine if your body is acclimated to the extreme conditions. All wrapped up in a titanium case, the Polar AXN700 ensures your ready for whatever nature throws at you.Polar exercise features