Astatic VS4 Classic Compact External CB Radio External Speaker - FREE SHIPPINGMax Input: 5 wattsImpedance: 8 ohmBig Mouth WeatherproofDimensions: 3 inch x 3 inch x 2-1/2 inchIncludes Mounting Bracket and 10 foot cord w/ 3.5mm mini plugAstatic Model 302-VS4