The Snapsafe in Wall Safe is designed to be mounting between two studs, securing directly to the studs. The pre drilled holes make installation a breeze. Made with high quality 16 gauge steel and a pry resistant door the SnapSafe In Wall is a great way to conceal your firearms safely and securely as well as other valuables. Requires 4AA batteries (Not Included). FeaturesInnovative latch mechanism maximizes useable interior space.16 gauge steel body construction and 8 gauge steel door.Electronic lock with key backup.Light grey durable powder coated finish.Ability to orient as left or right opening.Removeable storage shelves.Audio and LED visual warning light when battery is running low.Magnetic jewelry/key hooks.Magnetic document holder.Spring Assist Door.4 AA Batteries (Not Included).