SoundPEATS A1 Bluetooth 4.1 Headphones with Built-in Mic and 12 Hour Battery, Black Bluetooth 4.1 stereo headphones is advanced bluetooth csr version 4.1 latest technology The A1 headphones feature a lithium-ion battery that not only charges quickly, but gives you up to 12hr of battery life These headphones were designed to be small enough for you to comfortably tote around Soft-touch rubberized exterior, for a wonderfully smooth, tactile experience Control your music quickly and easily with controls located on the headphone