Optex IVPDH IVision+ Wireless Intercom with Video View and talk to visitors 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 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 2000s sensor unit. 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. The Handheld Unit comes with a battery pack and charging cradle, while the door unit runs on 3 AA batteries. (Not included)