GranVela S1 Dual Drives Neckband In-ear Headphones with Mic and Noise Isolating Earbuds, Ergonomic Comfort-Fit for Running, Gym - Blue Clear, Dynamic Sound and Enhanced Bass, Applying powerful high-performance neodymium magnet moving coil drive unit, achieving higher sensitivity and wider frequency response. In-ear design provides ambient noise isolation to improve listening experience. You can listen to your music and phone call clearly even in noisy environments like gym, fitness walk, subway/bus commute and flight trip. Ergonomic earpiece design, It provides long-term wearing comfort and never falls out. They are comfortable fit even after longtime workout. You can even wear these earphones to sleep in and don't notice much they are in your ears. Multilayer design,super Hifi audio cable,durable tensile,the best sound quality performance. Compatible with all, The Earphones are compatible with Apple iPhones, Android phones, tablets, Kindle, eReaders, and any portable devices with a standard 3.5 mm jack.