ASSA ABLOY Hospitality supplies Door Viewer with Glass Lens. ASSA ABLOY Hospitality supplies a wide range of electronic equipments for guestroom security, hotel door locks and in-room safes in the hospitality industry. The Door Viewer with Glass Lens is used to identify the person who stands outside before opening the door. The Door Viewer is available with a Glass Lens of a wide angle of 200 degree and provides all round clear angle of view.