You can listen to music and talk on the phone through an external speaker without having to wear earbuds. Contoured & Stay-Put Design Stable and secure design that gently wraps around the neck without risk of becoming dislodged even amid intense workout. IPx4 Rated Water & Sweat Resistant IPx4 waterproof rating protects product intact from excess sweat or water splashing Dual MEMS Microphone Dual MEMS microphone and a beam-forming solution are applied, which work to trace the voice emanating from your mouth in order to attain optimal call quality. Qualcomm aptX HD compatible The Cutting-Edge Qualcomm aptX HD wireless codec plays 24-bit Hi-Fi source without any loss of sound. Fitness Monitoring Being able to track your walking pace through built-in sensor functionality that operates through a smartphone app, you can monitor your distance traveled, calories burned and more.