SIYN Bluetooth 4.1 Wireless Sport Headphones Sweatproof Running Gym Bluetooth Stereo Earbuds Earphones Car Hands-free Calling Headsets with Microphone HiFi Stereo Sound for iPhone Android (Black) SIYN Bluetooth headphones feature Bluetooth 4.1 + EDR APT-X audio decode technology, ensure high-fidelity stereo music and clear speech via professional CVC6.0 Noise reduction;Stable Bluetooth signal and superior wireless performance offer you a best-in-class music experience. SIYN Bluetooth headphones for iPhone 6, Android phones & tablets and other Bluetooth devices can pair with 2 different devices simultaneously which gives you double the possibilities for answering calls and streaming music to your workout headphones, all while enjoying premium Bluetooth earbuds wireless sound quality Long listing with SIYN bluetoothheadphones,running& workouts can go for longer to the beat! The polymer 80mAh battery in the SIYN Bluetooth headphones wireless device provides 8 hours of talk & playing time & 175 hours of standby time. Support 4 kinds of voice prompt, such as English, French, Chinese, Spanish SIYN bluetooth headphones with quality micfunctionality ,strong Wireless Signal make you can enjoy skip-free music in a 10-meter working distance, even if use your music devices left/right side, above/below waist. Lightweight and portable design wireless Bluetooth earphones, with magnetic adsorption earbuds to avoid waste of time in a mess of headphone cable when you are ready to listen music or answer a call;IPX4 sweatproof and waterproof rating makes it a great set of outdoor portable headphones.