1.scope of application:application all type of door.no frame door can choose bracket.swinging door:90.for in-swing dooror out-swing door 2.fail-safe operation,no noise. 3.unlocking mode:power to unlock 4.temperature rating:-40c-100c 5.voltage:12v/24v optional 6.130X107X55mm 7.accessories optional:access control,power supply,ect