1.scope of application:application all type of door.no frame door can choose bracket.swinging  door:90 degree.for in-swing dooror out-swing door

2.unlocking mode:power to unlock,no noise

3.temperature rating:-40c-100c

4.voltage:12v dc

5.different series different sizes

6.accessories optional:access control,power supply,remote control,ect

7.different finishing optional:sprayed ,plated ,ect...

8.delay function:the time delay is adjustable

9.intelligent control

10.anti-interrupted

11.lock position auto correction