The Wahoo TICKR is a very precise heart rate monitor that helps you achieve all your sporting goals. The TICKR heart rate monitor accurately measures your heart rate and calorie consumption during your activity. The Wahoo TICKR heart rate monitor has a flexible, universal heart rate strap that is easy to secure around the chest. Here it measures the electrical activity of the beating of your heart. This is generally more accurate than heart rate measurements via the wrist, most of which use optical sensors. You can remove the chest strap just as easily and rinse it off under a tap after exercise; the TICKR is then ready for your next activity. Water and sweat are no problem for the TICKR thanks to its IPX7 water resistance rating. Weighing only 48 grams, it is also the lightest heart rate monitor on the market. You will hardly feel you're wearing it! The Wahoo TICKR features LED indicators on the top of the sensor for you to see whether it is connected via ANT+ or Bluetooth and whether your heart rate is being measured. The Wahoo TICKR can be connected with up to 3 devices simultaneously, such as your bike computer, smartwatch or smartphone. Connecting your TICKR to your smartphone opens up a whole world of workouts! Thus, you can easily use the Wahoo Fitness App, and the TICKR also communicates with apps such as Strava, The Sufferfest, Adidas Running or the Nike Run Club app. The CR2032 battery can last for up to 500 hours of workouts.