VS-52BM Size: 20.67" x 13.78" No need to fumble for your keys anymore. Viking wall safes have a quick-sensing biometric reader, with an accuracy that is unmatched, and makes keys a thing of the past. While low quality safes can take multiple seconds to read fingerprints, Viking safes do it in less than 1 second. Other biometric safes are made with "locker level" material that can easily be preyed open. Viking safes are engineered to stave off both prying and professional picking. The fingerprint programming takes seconds to complete and is so easy a child can do it. Viking safes are also the best looking in the market. Your average locksmith is not going to be able to replicate the keys that come with it, so no need to worry about an unauthorized person making copies. The fingerprint reader is the best type available - an optical sensor with a very high DPI. Features: -Finish: Black powder-coated. -Heavy gauge steel on all sides construction. -High security manual override key system, 2 supplied (not needed to open safe). -Stores up to 100 fingerprints. -Pry-resistant lock. -Visible warning when battery low. -Predrilled holes. -When batteries die or are replaced, fingerprint information is not lost. -Optical sensor (not semi conductor). -Large 510 ms. fingerprint recognition time. -Motorized door powered by 4 AA batteries (included). -Steel mounting bolts included. -Optical sensor (not semi conductor) Disclaimer: *Not recommended for people who meet the following conditions: people who have scarred finger tips, have wet or excessively moist or excessively dry hands, or are over 55-60 years of age (depends on the individual). Should not be used when hands are water soaked, or have excessive grease, lotion or dust on fingers.