Exclusive Tag Activated Feeder: Ensure your pets meals are exclusively theirs with the Petnology automatic pet feeder, equipped with a lightweight collar sensor. Perfect for multi-pet households, it prevents food-stealing and accommodates special dietary needs. Each smart feeder comes with one tag and supports up to 3 collar IDs. (additional collar tags can be purchased separately; Microchip not supported) Customizable Feeding Modes: Choose from four distinct feeding modes to match your pets eating habits. Set precise meal schedules or allow collar-tagged pets free access to food. The LCD interface of this smart feeder lets you customize up to nine feeding times, with adjustable door open durations for each meal. Innovative Design for Freshness: The fully enclosed design keeps food fresh by closing the door when not in use, protecting it from dust and others.