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Digital locks are wonderful tools to make your environment safe. You can use ten pin codes. Lock mechanism is activated when the right pin code is entered. Software program enables you to change lock mode from "automatic close" to "temporary open". The lock works then as any other lock. This feature is great when you have visitors who walk in and out from the room. Our digital locks have build-in cylinder, so you can use emergency key whenever necessary. Powered with three 1.5V AA batteries, good for about 5000 actions. Low power beep signal.