1.Security locks. Fail-safe type, Electronic Door Lock 2.Operation delay time: 0 sec., 2.5sec., 5sec., 9sec. 1. Power Supply: DC 12V. 2. Fail-safe type (Power to lock). 3. Door sensor (SL-100A:N.C/ SL-100B:N.C&N .0) 4. Operation delay time: 0 sec., 2.5sec., 5sec., 9sec.5. Electric lock ,fail safe type,Security locks. Security locks