DOSS BS1 Water Resistant Bluetooth 4.0 Outdoor Speaker, Hands-Free Portable Speakerphone with Built-in Microphone, 12 hrs of Playtime, Control Buttons |Green Latest Bluetooth 4.0 Technology - Connect your device in seconds;Outstanding connection range of up to 33 feet. Support A2DP and and built with a 3W driver and a passive radiator. It can streams incredible stereo sound with full range output, crystal clear articulate high end. IP Rated IPX4 designed as a Outdoor Speaker and Shower Speaker - Unique Rugged Design with Splashproof & Shockproof & Dustproof & functions make it suitable for outdoors and shower. Hands-free function:It has a built-in microphone, so you can conveniently pick up a call by this mini speaker in car, bathroom, at home or office, anywhere during it is connected to your Smart phone. Built in rechargeable battery, supports up to 12 hours playing time at the volume of 50%.