Beale's Indoor/Outdoor Wall Mountable Pendant Speaker with a 6.5? Polypropylene Woofer and 1" Silk Dome Tweeter. 40W RMS Power, 8 Ohms Nominal Impedance and Sensitivity of 85db. Transformer: 8 Ohm, 5W, 10W, 20W, 40W with a Frequency Response(?3dB) 100Hz-20kHz. The speakers have an Indoor/Outdoor Rating of IP66.Main FeaturesTransformer: 8 Ohm, 5W, 10W, 20W, 40WFrequency Response(?3dB): 100Hz-20kHzIndoor/Outdoor Rating: IP66Product Dimensions: 8.2" x 11"