Sargent & Greenleaf 2 movement reset time lock. Compact, sturdy case for dependable operation and the ability to fit in smaller, stand-alone safes. Manual locking button prevents accidental lockouts. Emergency inside release instantly unlocks the time lock. Clear, magnified window makes it easy to read time values. Equipped with reset movements 144 hour maximum. Time movements are precision instruments, made in Switzerland. Equipped with two movements (single redundancy). Comes with a time lock winding chart to simplify time setting.