SentrySafe EF4738E Fireproof Waterproof Safe with Digital Keypad, 4.7 Cubic Feet Fireproof safe is ELT Verified to endure 1/2 hour at 1400F to protect irreplaceable documents and valuables from fire Waterproof safe is ETL Verified for 72 hours of protection in water up to 12 inches deep offering peace of mind in the event of a flood Set your own digital combination safe for strong security; fire safe features five live-locking bolts and four deadbolts, solid steel construction, bolt down hardware, and a thicker door for advanced protection against theft; California DOJ certified gun safe Exterior: 21.7 in. W x 19 in. D x 37.7 in. H; Interior: 19.4 in. W x 11.7 in. D x 35.7 in. H; extra large 4.7 cubic foot capacity; weighs 217 pounds For optimal performance, SentrySafe recommends the use of four high-quality, name branded, alkaline AA batteries with an expiration date of 8-10 years from the current year. Generic and rechargeable batteries often do not have the lifespan needed to support long term usage