Benefits & Features: Indoor flush mount-requires cut out hole in wall to flush mount; looks like a vent when done proplery Low profile style Ideal for general purpose PA applications-Speaker version only FK56 Speaker Specifications Voice coil impedance: 8 ohms Rated power: 10 watts RMS, 15 watts peak Dimensions: 6.35” x 5” x 1.6” Color: White Material: ABS plastic Wiring: Black and red wires are non-polarized. FS66 Driver/Speaker Specifications: (Use this one if your control panel does not generate the siren tone) Operating voltage: 6 - 14 VDC Sound output: 100 dB @ 12 VDC Current draw: 400 mA @ 12 VDC Dimensions: 6.35” x 5” x 1.6” Color: White Material: ABS plastic Wiring: Red-warble, Yellow-steady, Black-common