PRODUCT GRADING Refurbished Excellent > Very light scratches and light signs of use > Refurbished to the highest standards. Retail Box WHAT IS IN THE BOX Yale DDV500 Digital Door Viewer Battery Not Included PRODUCT DESCRIPTION Always know who is at the door before you open it. Screen quality that gives you clear images which are visible from a distance. With a simple installation process you’ll be up and running in no time. Suitable for doors with thickness between 38mm - 110mm.