Gravity Deals&reg; Waterproof Wireless Bluetooth Handsfree Mic Suction Speaker Shower Car mic( Black ) Support Bluetooth & Wireless transmission Built-in Microphone, enjoying hand-free call. Easy access for Hands free Talking Volume up or down, fast forward and Backward, Pause / Play Power buttons. Sucker has a special function, strong adsorption Built-in lithium polymer battery provides six hours operating time