LKE Sound Bar HD High Fidelity Sound : Featuring latest Bluetooth 4.2 technology that produce incredible sound quality with deep bass and crystal clear treble,The wireless headsets gives you the ultimate music experience Never Power OFF : Both wireless & wired.1. The wireless mode: A built-in 350mAh battery provides up to 6 hours music time or talking time in a single charge; 2. The Wired mode: you can also use it as a wired headset with the provided audio cable so the headphones will never power off Skin Friendly Leather Earmuffs : Soft on-ear pads, no stress to our ears, Breathable material, suitable for wearing for a long time Hands-free Phone Calls : The headphones have build-in mic and volume control, its very convenient for you to pick up any incoming calls when you are listening music Gentle Reminder : Depending on your head/ear size/shape, it may be a little tight(feels likeon ear) for someone to wear which is designed to avoid sound leakage. In case of that and to get both audio and wearing comfort, please take off the headphone every 1-2 hrs to get your ears relax and protect them from muggy environment in use.