Bring the party wherever you go With Ibt77 water resistant rechargeable Bluetooth speaker. A passive subwoofer delivers enhanced bass. Enjoy Bluetooth wireless audio streaming from your Bluetooth-enabled device, or direct audio via the aux-in jack (cable not included). works with free Melody Voice powered music assistant app to play music from iHeartRadio, Spotify and more. Ip65-rated water resistant and dustproof. Slip-resistant fabric offers superior grip in wet conditions. Wireless stereo capability to link with another Ibt77 speaker (sold separately) for real stereo sound. Built-in mic, digital voice echo cancellation and answer/end controls make speakerphone use a pleasure. Operates on internal rechargeable battery, charges via included USB charging Cable. Convenient carry strap included.