Sound Cruiser lets you take your message on the road. Equip any car truck bus or boat for voice-casting in minutes. Twin horn speaker assembly easily mounts with suction cups and tie-down straps. System tailored for maximum voice penetration and intelligibility. Reach crowds up to 3000 people and cover the length of a football field! Plug into your car’s cigarette lighter, direct-wire the unit to your 12-volt car battery or use 10 D-cell alkaline batteries. Universal 2 horn speaker module mounts to any vehicle and easily adjusts at 450 increments for front - side - rear projection. Horn power rating: 60-watts impedance: 4 ohms volume: up to 119 db. 50-watt multimedia stereo amp, dynamic mic with 5 foot coiled cord, and DC car adapter & cables included.