wifi no screen(output by app) telephone one to one video doorphone

Screen Size:No Screen(output by APP); What's in the box:1Outdoor Unit; Screen Resolution:1080p; Lens:3.6; Connection:WIFI; Installation:Wall Mounted; Kit Configuration:One to One video doorphone; Viewing Angle:166; Answering mode:Telephone; Listing Date:06/04/2019; Production mode:External procurement