The Luxor LLTP18-B is the perfect solution to charging and securing up to 18 laptop / tablets. The rack shelves are 20"W x 16"D. Each shelf holds up to 9 laptop / tablets (12"H of top clearance). The bottom shelf space is perfect for storing accessories and equipment (4½"H of top clearance). Plenty of ventilation allows air to circulate freely through the unit. It includes vertical electrical outlets for maximized space. Electrical cords can remain powered through two small holes on the bottom of the unit. With four 4" full-swivel ball-bearing casters, two with locking brake. The locking doors include a traditional lock and key system.