Amplivox Portable Buddy PA System Audience Size: up to 1000 people Runs up to 200 hours with 10 D-cell alkaline batteries (not included), or use the optional rechargeable AmpliVox S1465 NiCad battery pack with S1460 AC adapter/recharger Built-in 6" x 8" Jensen design speaker, 50 Watt multimedia stereo amplifier Wired Handheld Mic