VTech IS741 Accessory Audio/Video Doorbell Camera, Black | Requires a VTech IS7121 Series Phone to Operate Stream video or take a snapshot of your front porch with this audio/video doorbell camera, with a built in intercom to IS7121 series cordless handsets Infrared Night Vision automatically activates in the dark Adjustable camera angle 1 year battery life and weatherproof design Accessory camera only - requires a IS7121 series phone to operate