Boombox V2 can be powered by the USB cable or with 2-AAA batteries if your wanting to use it as a mobile speaker. Plugs into any headphone/auxillary jack to play music from phones, I-pads, laptops and many more! The double stick adhesive pad attaches to anything thin, like styrofoam, paper cups, cardboard or plastic to deliver an amplified sound. The double stick pad can be cleaned with water to re-stick over & over. The kit includes: 1-Boombox V2 unit 1-USB cable 1-aux. cable 4-sticky pads.