Wahoo's ANT+ Key transforms your iPhone into an all-in-one training partner for running, riding, and going to the gym. Wirelessly connects your iPhone to fitness sensors and allows you to collect and track all your fitness data like heart rate, speed, and cadence through your favorite fitness apps.
• Connects your iPhone to ANT+ fitness sensors: heart rate, cycling speed/cadence, and power meters (each sold separately)
• Low-energy and does not require charging
• Weight: 3.5 grams