Here is an earphone that offers real-time heart monitoring. The LG FR74 earphone tracks your metabolic rate and maximum oxygen consumption (VO2 max) rate. You will also be able to listen to your favorite music at the same time. There is no need to wear a chest strap to use this device. The HRM Earphone Heart Rate Monitor keeps track of your distance, calories, steps,, direction, and more in any weather condition.
The earphones are connected to a medallion device that you can strap on your arm or clip on your waistband to process data and send information to your Bluetooth device. This is compatible with your Lifeband Touch fitness tracker too. Just download the LG Fitness app, and you are set. It makes a nice gift for fitness enthusiasts.[Source]