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 : Large size of 51 L with a weight of 17 kg. External Dimensions: 35×33×50 cm (L x W x H); Internal Dimensions: 34.7×27×49.7 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