The Safe MFL2014E Depository Safe's all steel construction is designed for protection against robbery and internal theft, allowing quick deposits and secure storage without access inside the safe. The battery operated electronic lock is protected by an internal spring loaded relocking device. Easily secure this safe to the floor or wall with the four anchor holes provided. You also have the option of selecting a combination or electronic lock. With the electronic locks, if the combinations have been entered incorrectly, then the lock will go into a lockout penalty mode that will prevent any further combinations to be entered. Features heavy-duty dead bar, hinges, a 1/2" thick steel door, and anti-fish baffle for added security. Operates on a 9 volt battery (not included) and has a low battery warning. External dimensions are 20-1/4" x 14" x 14" and interior are 8-7/8" x 13-3/4" x 11".