TP256-i The Indoor/Outdoor iPod Speakers These are the battery-powered speakers with a water and UV-resistant exterior that allow you to listen to iPod music by a swimming pool or any location without the need for speaker cables or outlets. 1. 10-Watt stereo speakers (5" subwoofers and 1" tweeters) 2. Each speaker is powered by rechargeable battery that operates 8 hours, and also can powered by AC/DC adaptor. 3. Include speaker wall brackets for wall-mounting 4. Package includes 4.5A Lead-Acid internal rechargable battery for speaker that have continous use for 7 hours. 5. Remote control the speaker volume, treble and bass