Magnetic Attraction: Hang like a necklace around your neck??about 10-meter working distance?? this sport headphones will let you enjoy music when running?? gym?? sports & exercise</br>Noise Cancelation Technology: Use CVC noise cancellation technology reduces outside noises when you enjoy music.</br>Stereo Sound: built-in HD Mic and latest Bluetooth V4.0 version??ensure Hi-Fi stereo music sound quality and strong signal.</br>Sweatproof and waterproof Ergonomic in ear design??comfortable to wear?? best choice for doing sports.</br>With CSR4.0 APT-X audio deco