InzhiRui Waterproof Sport Speaker, Portable Wireless Speaker, Bluetooth Speakers Built-in Mic 500 mAH Rechargeable Battery 6 Playing Hours (Black&Blue) Compatible with all bluetooth enabled device, easy access to Hand free Talking / Volume up / Volume down / fast forward (skip) / Backward / Pause / Play / Power buttons. Built-in hands free function anwser your call without delay,built-in TF card slot support MP3 music play Built-in rechargeable 3.7V, 500 mAh lithium-ion polymer battery: Provides extended playback, enables you to stream music for up to 6 hours on a full charge Water-proof and sand-proof design: Safeguards the subwoofer sound speakers against water submersion, plus dust and other small particles, so you can listen to music both indoors and outdoors Handsfree Portable Speakerphone with Built-in Mic, 6hrs of playtime, Control Buttons and Dedicated Suction Cup for Showers, Bathroom, Pool, Boat, Car, Beach, & Outdoor Use