Test, monitor and analyze your physical fitness level with the built-in heart rate monitor and VO2 Max measurement – all while listening to superior sound quality music for the extra motivation you need to power you through your next training run or workout. Get rid of the surrounding noise at the gym and focus on your performance! With superior sound quality, passive noise cancellation and enhanced bass, Jabra Sport Pulse will make sure that your favorite playlist sounds better than ever and will maximize your music motivation. Understanding your heart rate is as simple as putting on your headphones. The built-in heart rate monitoring technology measures your heart rate via your inner ear. Jabra Sport Pulse delivers clinical-grade accuracy and ensures that you are always training at the right intensity level to improve your performance. Let your heart rate become a stable parameter for measuring your performance and push yourself even further. VO2 Max is a scientific way to measure your absolute fitness. Analyzing your VO2 Max levels can be used to enhance your performance and further your training. For instance, a 5% improvement in your VO2 Max score would typically cut 5 minutes off of your 10k run time! VO2 Max describes the maximum rate of oxygen that your body consumes during exercise, and also helps to determine your endurance level. By constantly measuring and analyzing the data, you will be able to track your performance not only in terms of distance, time and heart rate – but now also analyzing your performance using real-time oxygen consumption levels like professional athletes.