Most of us don't think twice about answering our door to visitors and guests who come knocking or ringing our doorbells, but the truth is we live in a time when unwanted intruders are increasingly gaining access to homes and businesses through the structure's most obvious entryway—the front door. Indeed, peepholes and chain-locks allow you to see who's visiting at your door, but there's no denying the inefficacy of a peephole during dark nighttime hours, and the risks involved with a chain-lock if you're confronted with a figure you simply don't want at your door. For those of you wanting an efficient way of knowing exactly who is at your doorstep, look no further than the IVISION Wireless 2-Way Intercom System with Video from OPTEX. This unit differs entirely from other video-intercom systems in that it lends itself to convenient portability; with its powerful Camera Door Unit and a totally HAND-HELD LCD Display Unit, you'll be able to both SEE and TALK TO anyone approaching or knocking at your door regardless of where you are in your home! The Camera Door Unit is placed right outside your door and features a two way microphone and camera so you can both view and communicate with the visitor from the inside. Day or night, this unit will give you the peace of mind of knowing who is approaching, any time of day from anywhere inside! FEATURES 500ft transmission range, line of sight Two way Intercom 2.25" LCD Color Monitor Live browsing feature when door / camera unit is hardwired System can store up to 163 images Day/Night Operation Rechargeable battery pack and charging cradle included