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. 50 watt amplifier with built-in receiver. 16 Channel UHF wireless receiver from 584MHz - 608MHz. Lapel & Headset mic + transmitter. 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 with built-in receiver. Includes lapel & headset mic and transmitter. DC car adapter & cables included.