Replaces most mechanical combination locks. Easy installation and operation. Factory Reset Combination for solving lost combinations without requiring expensive service calls. Electronics are encapsulated within the lock and are sealed to prevent possible moisture related failures. Cable fits through a 1/2" spindle hole without cutting and re-crimping connector. Audible beep and flash from every keystroke gives maximum feedback to the user. 15 minute Penalty Lockout after four incorrect entries protects against manipulation attempts. New patented dead-latched lock design with an internal relock device for maximum security. Lock auto-locks when boltwork is thrown to prevent safes from being left in a day lock position. Optional internal battery pack extends operation between battery changes. Finish: Chrome