These Bluetooth Stereo Headphones deliver impeccable audio playback wirelessly; and the built-in microphone allows for automatic call receiving! The latest Bluetooth 4.0 Wireless Technology transmits high quality stereo music playback with strong bass and crystal clear sound. An adjustable headpiece and cushioned leather earmuff-style enclosures ensure the most comfortable listening experience possible while effectively reducing external noise. One touch is all it takes to pair them with your smartphone thanks to NFC connectivity that prompts Bluetooth to connect automatically. No codes to fuss with, no discovering of devices to wait for. Includes 3.5mm audio cable for wired connectivity. Internal batteries charge via included USB cable.