CAT DOOR WITH DETECTION: This cat door is battery operated and compatible with most common microchips. You can program up to 40 different chips and sockets 4 LOCKOUT OPTIONS: The white button allows these options: inside only, outside only, inside and outside exterior and fully locked DIMENSIONS: Suitable for animals up to 7 kg. Installation adapter and extension tunnel sold separately INSTALLATION: Can be done on wooden doors. A mounting adapter is required for PVC doors, walls and glass doors + windows