ROCK-SOLID CONSTRUCTION Outside is constructed of 16-gauge steel. Soft foam on the inside protects valuables. High-Strength lock mechanism performs reliably, time after time. FOOLPROOF SECURITY Precise fittings are virtually impossible to pry open with hand tools. Built-in computer blocks access after repeated invalid keypad entries. Tamper indicator alerts you to invalid entry attempts. CUSTOMIZABLE CONVENIENCE Battery power provides maximum security and easy portablility. Optional high-strength security cable secures GunVault in home, car, RV, office or motel. Mounts almost anywhere, in any direction. "Learn buttons" make it easy to program over 12 million user-selectable access codes. ADVANCED ACCESS Conveniently located keypad is easy to use. Unique No-Eyes® Keypad allows for quick access. Audio feedback confirms each correct keypad entry. Audio disable option adds the security of operating in silent mode.