The Brinno Digital PeepHole Viewer notifies you of the person at the door without letting you go through the strenuous peep-hole business. The person never gets to know your presence at the door but you get to see him/her easily and that too, in a much bigger size than through a general peep-hole. To see this enlarged image of your guest, all you need to do is press the button on the viewer and zoom it up. Repeated toggles on the button will help you in switching from regular views to enlarged ones and vice versa. Home security is absolutely necessary today, Brinno just makes this entire monitoring process easier and more comfortable.