2- Way, 6.5" Woofer, 4Ω Speaker, Versatile, Low Voltage, Self-Amplified, Surface Mount Speaker with Bluetooth features, Featuring an Aluminum Grill, High-Impact Polystyrene Housing and Mounting Bracket. Perfect for Schools, Hotels, Conference Rooms and Training Rooms. Low Voltage Amplified surface mount speaker combination, Each powered speaker (AMP-BT602-1) can drive three additional non-powered speakers (P602). One line can drive up to 10 self-amplified speakers. Lower noise feature and protection from shorts and overheating. 15VDC Level V power supply model PS15VDC35AL5 included.