The Armour39¨ Module & Chest Strap is revolutionizing how athletes monitor and improve their performance. The Armour39¨ Module & Chest Strap is worn around the chest in order to capture an athlete's heart rate and calories burned. The companion iPhone app will show the athlete's level of exertion and generate a WILLpower score to indicate the intensity of the workout. Combined, these metrics will help take any athlete to the next level. The Armour39¨ Module & Chest Strap is currently retailing for $99.99.