This Magnavox MMA3763BK Stereo Portable Speaker With Bluetooth Wireless Technology has a built-in rechargeable battery along with Bluetooth to stream your music wirelessly. The speaker features a 3.5 mm auxiliary port for simple connectivity to most audio devices. Magnavox speakers keeps the party going and going strong. Experience a premium audio experience that is built for the great outdoors. Connect to your smartphone, tablet or other audio device via Bluetooth or the Aux port to listen to your music, videos or games wherever you go.