The first of its kind, the VTech IS7121-2 two-in-one cordless answering system and video doorbell combines a versatile phone system with a digital camera, for convenience and securtiy at home. Like Caller ID for your front porch, this video doorbell allows you to screen visitors before answering the door, without worry of being seen. Take a snapshot, or stream video -- the camera automatically snaps a photo and sends it to the handsets when visitors ring the doorbell. You can then stream video, audio, or both with just two buttons. The doorbell has a waterproof video camera with adjustable camera angle and automatic infrared night vision. The handsets have a 1.8" color display and room to save up to 100 photos. You can use the intercom between the handset and base unit and conference between an outside line and up to 2 cordless handsets.