The product is a genuine OEM overhead roof dome light designed specifically for the 2005-2011 Cadillac STS. It has been tested and comes with a 30-day warranty. The light features a reading lamp, is a direct replacement part, and includes items as shown in the photos. The part numbers associated with this product are 25828898, 15246939, 25745189, 3521A-GTE06A, and 3521AGTE06A. This overhead dome light is a quality product from Cadillac designed for easy installation and functionality.