Sony DR-BT50 Stereo Bluetooth Headphones with Integrated Controls DRBT50 * Comfortable design with adjustable, padded headband * Auranomic design on the earpiece from w/in the earpiece * Stand by time approx 200 hours * Rechargeable function * 40mm headphone driver units with Neodymium magnets * 17 hours of operation with the rechargeable battery * Built-in controls for volume, play, pause, stop, rewind, and fast forward * Over-the-head adjustable headband with large ear cups for superior sound quality * Answer/end calls with 1-touch control and built-in microphone for hands-free conversations * Playback controls built-in on ear cup for easy access * Supports profiles: A2DP, AVRCP, HFP and HSP