The new iVision+ gives you the ability to not only know when somebody is outside your door, but to view and talk to them from the safety and comfort of any location inside your home or business. The iVision+ wireless intercom package includes a convenient wireless handheld unit with LCD monitor and a wireless doorbell/camera unit with over 330ft. transmission range, line of sight. OPTEX has also taken the peace of mind offered from the previous iVision model and expanded it, now allowing for multiple handheld units, multiple doorbell/camera units and the ability to remotely release electronic door looks through a gateway/chime unit. The iVision+ also integrates with the OPTEX Wireless 2000 (RCTD-20U)*, allowing the camera on the door unit to open when triggered** by the Wireless 2000"s sensor unit.The iVision+ allows you to know when guests arrive at your door, and speak with them from the convenience of multiple locations on your property. You never have to trust a peephole view or answer the door blindly again. In both residential and commercial applications, the iVision+ keeps you safe from unwanted guests.The iVision+ allows for multiple stations, making it a perfect fit to monitor up to two residential or commercial doors, from the comfort of up to four different locations.With the optional Gateway Unit, the iVision+ integrates with the OPTEX RCTD-20U wireless driveway / entry alert system. When the sensor is triggered on the RCTD-20U, the Gateway allows the iVision+ Door Unit to take still images before the button is pressed. When integrated with a third-party door lock, the Gateway Unit will release the look when "Open Door" button is pressed on the iVision+ Handheld Unit. Used alone with the iVision+, the Gateway Unit will act as an external chime when the Door Unit button is pressed.Both the Door Unit and Handheld Unit are battery powered, allowing for up to 330ft range line of sight. The Handheld Unit comes with a battery pack and charging cradle