Bluetooth Headphones, Valworld Wirless Bluetooth Earbuds/headset/earphone[running/sports/gym]&[sweat Proof/with Mic Noise Cancelling Stereo]for Iphone 5 6 6s Plus Android S6 Note 3 4 5 Lg Smartphone 1,Short Line: no trouble with knots,fitable for neck 2,Long Battery Endurance:6hs talking or music playing,180hs stand by,Only 2hs for charging to full battery 3,Sweatproof and 10 meters for bluetooth link 4,Pure Sound:UHD stereo and noise cancelling 5,Can link 2 cellphones in the same time.that means you can pick up calling from 2 different devices