Item Type: Portable Security Box Material: Cold Rolled Steel Sheet Color: Optional Size: Approx. 275 x 190 x 50mm / 10.8 x 7.5 x 2.0in Approx. 325 x 190 x 50mm / 12.8 x 7.5 x 2.0in Unlock Method: Fingerprint/spare key Fingerprint Type: Biological Fingerprint Surface Treatment: Spray Plastic Power Type: 4 AA Alkaline Batteries (not included) Operating Voltage: 4.8-8 6.5V resolution :500DPI Reject Rate: ≤0.01% Others Acception Rate: ≤0.001%