SDC battery powered electronic door locks and keyless entry system provide controlled access for basic and multi-level high security requirements. Additionally, E70 series keypads come standard with all of SDC's EntryCheck® features such as door sense/inhibit inputs industry professionals have become accustomed to from SDC keypads. E75K, E75P and E75PS models standalone locksets are keypad or PC software programmable, and combine multiple access technology with efficient motorized locksets. An optional passage mode feature comes standard