Home safe: protect your valuables with this personal safe, complete with interior LED lights for visibility; use as a tenant safe, hotel safe, and more Digital safe: choose between key pad or card swipe entry, while override key ensures you will always have access to valuables Security: electronic safe has two motorized live-locking bolts, steel construction, pry-resistant door, and bolt down hardware to help prevent unauthorized entry or removal of your personal safe Includes: security safe comes with auxillary remote battery pack, two override keys and bolt down kit Specifications: exterior: 7 in. H x 15 in. W x 11 in. D; interior: 6.5 in. H x 14.8 in. W x 7.3 in. D; medium digital combination safe with card swipe 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