Honstek X13 Sport in Ear Bluetooth Headphones 4.1 with Mic Passive Noise Cancelling Earphones Waterproof HD Stereo Running Earbud Headset Fast Connected for all iPhone/Sumsung/Sony etc.(Black\Green) NFC Fast Connection: Built-in NFC technology for simple and fast connection or disconnection stereo bluetooth headphones.and it can connect with 2 cell phones or tablets at the same time. Dual Battery Design: High quality stereo bass sound wireless bluetooth headphones professional with top Apt-X technology, up to 16 hours of Playing time and 160 hours standby and battery volume up to 160 MAh. CVC 6.0 Intelligent Noise Reduction and HD Microphone: Built-in HD microchpone and CVC6.0 noise cancelling sport bluetooth 4.1 headset with mic produces clear loud sound,convenient and easy to answer and end the phones. Comfortable and Sweatproof Design: Ergonomic design and Flexible comfortable silicone ear hooks wireless bluetooth earbuds to naturally fit for sport,Sweatproof design is built for extreme activities like Running,Jogging, Hiking,Biking,Gym,Cycling,Yoga and impact Sports. Universal Compatibility:Extra 3 pairs of ear cushions.fit different ear sizes,stay put and don't come loose,Lightweight with soft smooth silicone gel ear hooks and tips sports bluetooth headphones running for extended comfort;Compatible with Apple,Samsung,Sony,HTC,Xiaomi Meizu and all other models of mobile phones,ipad,MAC and all other tablet PCs,notebook computers,desktop computers.