Stack-On"s Total Defense 36-Gun Safe with electronic lock and door storage holds 36 guns, or can be converted to hold 18 guns plus storage, or all storage. This Total Defense safe is a California approved firearms safety device that meets the requirements of California Penal Code Section 12088 and the regulations issued thereunder. An Electronic lock with a drill resistant, hardened steel plate behind the lock provides greater security. Your new safe is tested and verified to be fire resistant for 60 minutes up to 1400-Degree F by ETL an independent testing lab. It is waterproof in up to 2-Feet of standing water for 72 hours, the safe must be bolted to the floor to maintain the waterproof rating. Stack-On"s 4-way locking with 1.5-Inch live action locking bolts has 8 locking points. There are 6 adjustable shelves included in the fully carpeted interior. The door storage system includes removable, zippered bags that let you pack and store your gear in less time as well as a large document pocket and removable holsters for pistol storage that provide flexible storage solutions. There is a trouble key included and batteries are accessible from the front of the safe and are easy to replace.