Santen Wireless Bluetooth 4.1 In-ear Sports Stereo Earhook Noise Cancelling Headphones for Smartphones - Black Comfertable and sevure fit With Techbaum Advanced bluetooth version 4.0 wireless headphones come with EDR(Enhanced Data Rate) technology, makeing it possible for the bluetooth signal to spread further and more efficiently. Built-in CVC 6.0 noise cancellation technology make it a pure stereo sounds experience Longer listening with the polymer 85mAh battery in the Bluetooth headphones wireless device provides 5-7hours of talk & playing time & 180 hours of standby time Much more than other sports headphones! Unique flexible design and custom earbuds ensure you get the perfect fit and remaining stable in your ear Simple to use interface : the simple user interface on one of the earphones allows you adjust the volume, play/pause, select songs and answer/hang up calls completely effortlessly and calls the last dial number from phone on the headphones directly Package Contents: Santen wireless headphones, user manual, charging cable and 3 different sizes earbuds.