There are today the security systems that are of utmost importance. You will find that there are different companies that provide complete security system complete with the video cameras and speakers. These can be operated from a single point or can also be handled from different areas.
They are connected with electricity and can be operated with remote system also. The recording of the cameras can be set up to send emails to the email account of the owner of the house and there are systems of sending SMS if there is any movement sensed. The expandable systems allow you options to add camera all over the house on the inside or on the outside too.
There are some security systems that will give you the alert when they sense a door or window opening. There are systems that will turn the sprinkler off and close the garage door when you are not at home. These systems are good for keeping a control at your home and you can explain the utility to your buyers and increase the value of the house that you are going to sell.