... lock 2.ANSI standard 3.4*1.5V AA batteries 4.cheap price,easy operation 5 ... free access from outside) Powered by 4x AA 1.5v alkaline batteries which are easily replaced (always ... degree can correct identification.9. Working voltage:4 *1.5V AA alkaline batteries, or 6V DC.10.Working humidity ... using:an arbitrary 360-degree10.Work voltage4pcs, 1.5V alkalescency batteries, or 6V direct current11.False ...