Bought this wanting a key-less entry method and liked the idea of a light up keypad.  The install was easy, but the instructions were written in a very small font.  However, this device eats 4 AA batteries in less than a month.  But, the batteries are not dead. This device wants brand new batteries, not 3/4 full batteries, or even rechargable batteries.  Also, most of this is plastic, and the unit I had came with 2 of the 3 screws to secure the cover on.  This device requires removing 3 very small screws that are close to the door itself to pull the battery container out of the device. Each time.  The cover has to be on as it has the deadbolt lever
 Will be finding an alternative.