Field-programmable in just seconds for fail-secure or fail-safe applications. Can be used on virtually any cylindrical door locking system. Use of an optional digital keypad with the unit assures high security without the need for a key. Suitable for office-type applications. ANSI-sized faceplates - 4-7/8"x1-1/4"x1-1/4" (124x32x32 mm) and 7-15/16"x1-7/16" (202mmx37mm). Symmetrical-sized. Reversible for right-hand or left-hand doors. Low profile: strike is only 1-1/4" deep for use with hollow aluminum frames. Powered by a solenoid, not a buzzer coil. Stainless steel lip (keeper) for strength and long life. Non-polarized connection. Wires can be reversed. Current draw 280mA@12VDC, 140mA@24VDC. Tested to 1 million cycles. Power connector for easier installation. CE approved and UL listed.