Mixcder Bluetooth Sport Headphones,Runto In-Ear Noise Cancelling Stereo Headsets with Build-in Mic for iPhone 6S 6 5SE Samsung S7 S6 Android Latest Bluetooth technology: latest wireless Bluetooth 4.1 technology with A2DP stereo music Good noise isolation and balanced audio: good noise isolation to block out any external sounds Incomparable long standby: built-in 160mAh rechargeable lithium battery, up to 8 hours of talking Technical ergonomics design and free travel case: sweat-proof, light weight and soft rubber Top-brand audio accessories and 20 years of production