The Bogen ACD2X2U Self-Amplified Drop-In Ceiling Speaker With Back Can and Recessed Volume Control is a full-range speaker that allows for fast and easy installation, which saves installation time, effort, and cost. The 2' x 2' speaker 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 ACD2X2 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.