The Anchor Audio AN-130+ Speaker Monitor will allow you to command the classroom, dominate the board room, and enthrall the lecture hall. This system is lightweight, easy to use, and provides a powerful 103 dB of sound to fill the room with your voice. It is designed to project clear, intelligible speech, and is also great for music. It is not battery powered, and runs off of AC power only, when connected to a power source. The AN-130+ can be mounted on a stand, to the wall/ceiling, or placed on a shelf. Just switch it on, adjust your volume, treble and base, and you are ready to go. It's ideal for presentations, so teachers and corporate presenters often use it with a video projector, CD/DVD player, iPod, MP3, or PC. Use it in the classroom, conference room, studio, or theater.