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.