Awolf Mushroom Portable Bluetooth Wireless Mini Speaker Music Player with Suction Cup Built-in Mic Hands-free (Candy Red) Compatible with 99.9% bluetooth devices. Built-in microphone, enjoying hand-free call, perfect sound quality. Portable mini type is convenient for you to carry. Special suction cup design, could be sucked on any flat surface including phone, desk, wall, window. Constant playing time of about 2.5 hours.