Jabra Sport Pulse Wireless Bluetooth Stereo Headset with Built-In Heart Rate Monitor Wireless Sports earbuds with Dolby sound enhancement and biometric built-in heart rate monitor Jabra SPORT LIFE application to calibrate for an optimal fit & heart rate measurement, as well as integrated training management and three sophisticated fitness tests Control music and calls directly from the headphones in-line controls IP55 Certified, drop, strength, dirt, temperature & humidity tested - US Military Standard Works with most popular fitness applications on iOS and Android devices to provide pace and distance alerts