Ozone 55 Litres Fingerprint Safe Locker for Home & Office – Fingerprint Lock, 2-in-1 Unlocking (Fingerprint & Password), Size: 555H x 350W x 360D mm, Weight: 24.7kg, 2-Year WarrantyCombination Locking System The safe can be accessed by a three to eight digit password or fingerprint. The two systems can be used separately or combined, in which case a combination of the two will be required to open the safe. The system can register up to 29 fingerprints External Battery Back Up The safe is operated by 4 x 1. 5 V AA batteries. If the battery is completely drained, there is an option of external battery backup until you replace the