Audio Unlimited Factory Re-Certified 900MHz Wireless Indoor/Outdoor 4 Speakers Audio Unlimited Factory Re-Certified 900MHz Wireless Indoor/Outdoor 4 Speakers Compact & portable with a stylized design (10H x 5W) - 3inch Rubber edge Woofer 2inch Mylar cone Tweeter 10 Watt RMS Output9V DC Transformer Speaker can either be battery powered (using 6 C batteries per speaker - not included) or, using the included AC adapter Speaker can be up to 150feet away from audio source Weatherproof for outdoor listening Connect to your computer for remote listening