Newest Bluetooth CSR 4.0 Stereo Sporting Waterproof Shocking Bass Long Standby Neck-around Neckband Style One to Two Headphones Headset with AAC aptX - Supports Wireless Music Streaming and Hands-Free calling (Green) Bluetooth 4.0 with aptX codec for high-fidelity shocking bass stereo music and clear speech,You can begin enjoying CD quality stereo sound instantly when running or sporting. Compact and comfortable design, this bluetooth headset reach up to 12 hours of music and talk time, while others have only 6-8 hours. With this waterproof sporting neck-around headphones,you can get much more enjoyable and comfortable hearing experience. Furthermore, it's convenient and easy to take with you wherever you go. AptX has been the best kept secret of the professional audio industry for many years. Now music lovers can enjoy the rich listening experience that only aptX can deliver:pure wireless sound that doesn't compromise on audio quality. Easily control your music using side function buttons such as Play, Pause, Next, Previous, Volume.The bluetooth headset can be paired with two Bluetooth-enabled devices at the same time.