Oco HD 960p Indoor Video Surveillance Security Camera with SD Card, Cloud Storage, 2 Way Audio and Remote Viewing (3 Pack) Glass Doors flat surface and connect each flat surface and connect each piece until your area is fully covered assembly required Fits single door openings between 30 in wide and 80 in height Two kits can be used for openings up to 60 in wide Includes backer board for mounting track hardware that matches color of slab Includes floor mounted guide with groove on bottom of door for smooth operation Unfinished doors give you the design flexibility to choose any finish color this system delivers essential features like two way audio and night vision and start monitoring in under a minute