Audience Size: Up to 1,000. Room Size: Up to 10,000 sq. ft. Compact 50 watt powerhouse of presentation versatility Use Indoors or Outdoors. Weighs only 4 lbs. (8 lbs. with batteries). Contains Multimedia Stereo Amplifier and one 6" x 8" Jensen designed speaker built into rugged, durable case; Includes professional dynamic cardioid mic with 15' cord, shoulder strap, and 2 audio interface cables ( 7-ft; stereo 3.5mm male/2 RCA jacks; computer interface cable 5-ft; stereo 3.5mm male/male jacks). This system is also an excellent companion for your video projector or laptop. Power with 10 D-cell alkaline batteries (not included) for up to 200 hours; International AC Adapter/recharger and Rechargeable Nicad Battery Pack also available 13-1/2"W x 4-1/2"D x 11"H overall.