"Valcom's V-9022 Lay-in Ceiling Speakers Save Time, Effort & Money and allow you to Get On & Off the Job Quickly, No Cutting Tiles, No Broken Tiles, No Mess, Excellent Music & Voice Quality, Inconspicuous Front Accessible Volume Control, ntegral Backbox Meets or Exceeds ASTM E84 Flame & Smoke Test with 3 Hour Burn Rating (UL 181), Durable White Acrylic Baked Enamel Finish, Built-In Amplifier, Affordable, Approved For Use In The City Of Los Angeles (RR 7811), Includes Trim T-Bar, * UL Approved V-9022 & V-9021, Approved by Chicago Fire Marshalls for use in the city of Chicago (CPN 11280); Shipping Weight: 5.5 lbs. (1.82 kg); Dimensions: 23.75"" L x 23.75"" W x 3.75"" D(60.32 cm x 60.32 cm x 9.52 cm) 5.5 lbs. (1.82 kg)"