How to Use: Install the battery and it can be used, and can be set up and operated according to the manual. Specification: Item Type: Fingerprint safe box Material: Thickened cold rolled steel Colour: Black Battery Type: 4 x AA batteries (not included) Fingerprint Sensor: Semiconductor Fingerprint Sensing Technology Fingerprint Head Shape: Round Storage Capacity: 20 sets of fingerprints Administrator Fingerprint Capacity: 1 set of fingerprints Technology: Biometrics False Acceptance Rate: <0.002% Rejection Rate: <1% Fingerprint Collection Time: ≤0.5 seconds Fingerprint Matching Time: ≤1.0 seconds Lock Cylinder: Plum lock mechanical lock cylinder Password Unlock: 6-digit password unlock Application Scenarios: Office, bedroom, living room, cloakroom, etc. Package List: 1 x Safe Box 3 x Screw 3 x Expandable Rubber Stopper 2 x key 1 x Manual