Feature: 1. With strong cold-rolled steel plate, each safe is equipped with stainless steel wire rope and elastic band, memory foam padding in the box to ensure that the contents of the box will not be damaged by external force. 2. A4 paper size, 50mm/2.0in thickness, this device can be placed in a suitcase for easy portability, and can also be placed on a desk, drawer, bookshelf, or in a car. It is compact and does not take up space 3. 4 AA alkaline batteries (not included) for power supply, support rechargeable batteries, there will be a reminder to replace the battery when the power is insufficient, the sudden power off is fine, the stored fingerprint can continue to use. Specification:Conditon: Brand New Item Type: Portable Security Box Material: Cold-Rolled Steel Plate Color: As Pictures ShownOptional 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 Unlocking Method: Fingerprint/Spare key Fingerprint Type: Biological Fingerprint Surface Treatment: Spraying Plastic Power Supply Type: 4 AA alkaline batteries (not included) Working Voltage: 4.8-6.5V Resolution: 500DPI False Rejection Rate: 0.01% False Accept Rate: 0.0001% Package List:1 x Biometric Fingerprint Safe Box1 x Elastic Band 1 x Steel Wire Rope 2 x Spare Key1 x Instruction Manual (English) Note:make sure you will not mind before ordering.The product can only use 4 alkaline batteries can not use acidic or carbon batteries or it can not be turned on.