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