Product Dimensions: 17 (Depth) x 23.1 (Width) x 17 (Height) cm Lock Type: Electronic, Key Color: Black Material: Steel Alloy Special Feature: Fire Resistant 21 Liters, Exterior: 23 cm × 17 cm × 17 cm, Interior Size: 16.5 cm × 23 cm × 11 cm (Please pay full attention to the dimensions of this small safe box), it gives you easy personal access to your valuables. Digital Lock - The electronic security lock box is equipped with an easy-to-program digital keypad for easy locking and unlocking by entering your security combination. It includes two emergency keys for quick and immediate access. The home safe box has pre-drilled holes for mounting on the wall or floor. Safe with 2 expansion bolts included for secure mounting on the wall, floor, or shelf. It features two pre-drilled mounting holes and includes mounting hardware to secure it inside a closet, on the wall, on a shelf, or under floorboards. The electronic password panel of the digital lock box is carefully designed to set a password of 3 to 8 digits. If you forget your password, you can use the emergency key to open it and reset your password.