This radio frequency head phone is convenient, chord less and lightweight on the ear and it receives sounds from a transmitter base when it is connected to an analog out put. So you can listen to anything from a TV source to a computer and more. Interference-free reception through walls, ceilings and outdoors up to 300 feet. There are no regrets for this brand. Sound is crisp, base is powerful and mids are prominent. It is possible to get some static in certain areas but this does deliver the best quality sound. When in the room with the base the sound fulfills your needs making you satisfied with this product. It is said that Sennheiser cannot be beat on this level of sound and quality. When charging the earphones, you can simply place the headphones on the base to get it connected while it charges effortlessly. If you would like to purchase or know more about this item click on the link down below.