The CSD2X2 is a 2' x 2' speaker that fits perfectly into place in 2' x 2' ceiling grids without needing to cut ceiling tiles or requiring the use of tile support rails. The CSD2X2 can also be easily installed in 2' x 4' ceiling grids just make one cut to the ceiling tile, position the support rail (included), and drop the speaker into place. Finely perforated grille over the entire front of speaker Fully enclosed, industrial grade steel construction Enclosed Back Can 8'' main cone with secondary high-frequency cone 70V/25V, 4-watt transformer (4, 2, 1, 0.5, 0.25 watt) taps; selected by rotary switch Seismic attachment points Available in off-white and bright white ( U versions) grille finish ''VR'' versions have a Recessed Volume Control (front-mounted) Complies with Requirements of UL-2043 Support Rail Crossbar (included)