These are the 3D surround speakers that play robust audio wirelessly when paired with any Bluetooth-enabled device. Employing SRS and proprietary bass-boosting technology, the speakers enhance the details and audio cues often lost when using the built-in speakers or tinny headphones of portable devices. The dual two-watt speakers enrich the audio experience of watching a movie on an iPad, listening to music on a Bluetooth-enabled MP3 player, or even playing games on a handheld system. They can also be connected to a laptop or other device with the included USB, Mini USB and stereo cords that retract within the speakers themselves. The speakers compress to less than 2" H for transport in the included leather carry bag. A 2 1/2-hour charge of the lithium ion battery via USB provides eight hours of continuous play. 4" H x 3" W x 3" D. (13 oz.)