1. User-friendly functionality for the user 2. The ability to encode from 3 to 8 digits 3. Dada warning lights to replace the battery weakness 4-4 hole on the back for connecting Fund 5-year unlimited warranty and after sale service 6-If Input 3 errors in the system for 5 minutes Barrmz not accept password 7-a key lock to open in an emergency 8 hang-capacity 86-key number
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