Designed for Durability High Sensitivity, Intelligent Compatibility Volume control feature makes it easy to operate Ergonomic design, comfortable to wear Support the use of devices with 3.5mm headphone jack Anti-interference wire, not easy to tangle, resistant to pulling Supports voice calls, single-button design can support playback/pause, song cut, hang-up Crisp vibration full of tension and elasticity can obtain a strong bass with excellent low frequency