These are two rugged, versatile speakers that you can take anywhere - from your bedroom to the garden to the hot tub out back - and listen to wirelessly transmitted music. So leave your iPod inside with your computer, home theater system, and boombox and simply plug any one of them into the 900MHz DHT Transmitter which will broadcast your up to 150 feet to your speakers.There isn't much you can't do with Velocity's Wireless Speakers, each with independent tweeters and subwoofers that put out a surprising amount of sound. Built-in wall mounts and the included AC adapter allow you to use these speakers to extend your home theater to any room in the house. And when you need sound somewhere else, simply unplug the adapter, pop in six "C" batteries and enjoy Velocity's precision sound anywhere.