Our amplified PA speaker is completely weatherproof. It comes with a 6" ABS plastic speaker and requires a 10-16V DC supply. An adjustable metal mounting bracket is included. Technical Specifications Dimensions 6" (Dia) x 6" (L) Frequency Response 500-5,000 Hz. Input Impedance 3 - 16 ohm Max Power 20 Watts Mounting Bracket Metal mounting bracket included Speaker Impedance 8 ohm Supply Voltage 10 - 16V DC required