Strong & Secure : The safe is made of reinforced solid steel wall structure.Double cylinder latch improves safety and reliability.Provides physical protection against forced entry Smart Capacity : 8.5 L. External Dimensions: 31×20×20 cm (L x W x H); Internal Dimensions: 30.7×14×19.7 cm (L x W x H). It gives you enough capacity for your valuables Easy Operation : Opens with your digital code or keys.Digital numbers can be programmed 3 to 8 digits long.3 different colors of lights flashing, indicating different states. You can clearly see if your operation is correct or if the battery is fully charged Easy to Install : 4 AA batteries to control the battery operated digital panel.It has pre-drilled mounting holes and includes mounting hardware to mount it in a closet, shelf or closet under the floor If you have any questions or difficulties, please contact us, we'll be glad to help you