Self-amplified, dual input, one-way 2' x 2' Lay-in Ceiling Speaker with built-in volume control for installation in suspended ceilings.- Easy Lay-in Mounting.- Replaces 2' x 2' Ceiling Tile.- Speaker Wired With Plenum Rated Cable.- Backbox Meets Or Exceeds A.S.T.M. E84 Flame And Smoke Test - 3 Hour Burn UL 181.- Durable White Acrylic Baked Enamel Finish.- 2 Audio Inputs.