Wireless public address system has 100 watts of power for audiences up to 10,000 people. Allows freedom of movement up to 200' away with included handheld wireless microphone. Features a built-in CD player and cassette recorder, multiple mic inputs for optional microphones, retractable luggage handle and built-in casters for easy maneuverability. Full array of multimedia controls and features. AC/DC power amplification. For indoor or outdoor use.. Contact Information: http://www.shoplet.com/customersvc/send_message.html , Return Policy: http://www.shoplet.com/help/return_policy.html