MPOW Seals Airflow Bluetooth V4.1 Sport Earbuds for Music Enjoyment and Hands-free Talking ● In-Ear Acoustic Cavity Structure In-ear acoustic cavity structure furthest reduces the blockage of sound. A small drive is designed inserting into the front cavity directly to take the sound closer to your ears, so bass becomes more powerful and inpulsive than other headphones. The independent rear cavity raises the active area of the diaphragm largely, medium-high frequency do better to make total sound effect more tunable. ● Wireless Sports Headset Constructed with sweat-proof materials coupled with adjustable earhook that provides secure fit, these wireless headsets have been designed for the fitness enthusiast who wants ultimate freedom while doing sports. ● World Class Bluetooth Technology and CVC 6.0 Noise Cancelling World class Bluetooth technology gives you crisp and clear audio wherever your workout takes you. You will never miss a beat. With 6th generation two microphones CVC technology, it can filter noises in all directions and keep clear talking voice effectively. ● IPX4 Waterproof Level When we say IPX4 waterproof level, we mean it can resist any drops or splashes of water from multiple directions. It is made for sports. ● Aerodynamics Stylish and Snugly Fit Design of Ear Shape The airflow surface of MPOW Seals is in accordance with the curve of the external ear, snugly fits your ear shape and perfectly sealing earbuds cut off background noise significantly, delivering the same quality sound at lower volume and thus ensures a longer battery life. Meanwhile, the 3 sizes of ultra-soft silicon caps of MPOW Seals sit comfortably in your ears without adding any pressure whilst blocking out unwanted noise. ● Excellent Battery Performance Up to 7 hours of continuous talking / music time and up to 240 hours of standby with a single charge, saving more time for fun! ● All in One Last number redial, audio switch, smart voice alerts, multi-point connection, voice dialing (Only for iOS devices) are all included in MPOW Seals!