Use Amplivox's Multimedia Stereo PA Amplifier as a part of your public address system and make it easy for your audience to hear during lectures and presentations. Attach your own speakers to this battery-operated, 50-watt amplifier via the two speaker jacks. This amplifier also comes with three microphone inputs, one each for dynamic, condenser and wireless microphones (not included) that can all be used at the same time. An additional line in jack has its own volume and tone control and lets you connect to your computer or multimedia player. A line out jack allows for recording of presentations. The Amplivox Multimedia Stereo PA Amplifier is backed by a six-year warranty.