First Alert 2070AF Expandable Anti-Theft Wall Safe with Digital Lock, 0.33 to 0.85 Cubic Feet Durable digital safe with heavy-duty welded steel construction, live door bolts, and pry-resistant hinges Adjustable capacity of 0.33 to 0.85 cubic feet Features a programmable digital lock with 2 emergency override keys 2 removable shelves to fit your storage needs Fits standard wall-stud spacing; includes mounting hardware and 4 AA batteries Adjustable .33 - .85 cubic foot capacity Reprogrammable digital access with emergency override key 2 live door bolts and pry-resistant concealed hinges Steel construction/mounting hardware included 2 adjustable shelves