With the help of this lock, you can open the door without going nearer to that. No need to come down unneccary through stairs or from else where. It is a very strong and heavy lock ( apx weight 2 kgs). Just pressing one switch from remote from any where of your building, you can open the door. This system can be used in any house, office, restaurants, shops, conference & seminar halls, and hospitals etc.Advantages saves unnecceray walking every time towards the gateprotects from burglary and other harassments.You can open the door lock by pressing switch from anywhere.Saves the cost of gateman