The Microchip Pet Feeder has been designed to recognise either themicrochip already implanted in your pet or the Sure Petcare RFID Collar Tag(one included – packs of two sold separately), allowing your pet to accesstheir food whilst keeping out other animals. Designed for use in multi-pethomes, the feeder will recognise authorised pets, opening only for them. Ifan unauthorised greedy or bully pet tries to eat from the bowl it will notopen, or if the feeder is already open the lid will close. The SureFeedbowls have an integrated seal on the top lip. This has been designed sothat once the lid of the feeder is closed a seal is formed with the top ofthe bowl, keeping your pet’s food fresher for longer. Please download theinstruction manual here: SureFlap Surefeed Microchip FeederBowl capacity, 400ml - two pouches of wet food. The SureFlap MicrochipPet Feeder requires 4 x type-C cell batteries to operate (not included).Battery life lasts approximately 6 months with low battery indicator thatwill flash when batteries need changing. Stores up to 32 pet identities inmemory - remembers all registered pets even when batteries are changed.an unauthorised greedy or bully pet tries to eat from the bowl it will notopen, or if the feeder is already open the lid will close. The SureFeedbowls have an integrated seal on the top lip. This has been designed sothat once the lid of the feeder is closed a seal is formed with the top ofthe bowl, keeping your pet’s food fresher for longer. Please download theinstruction manual here: SureFlap Surefeed Microchip Feeder