Your home will be safer. Collars or tokens that get lost or worse, can get caught in branches etc. are not required. Handling the SureFlap microchip pet flap is child's play. When the device is installed and the batteries are inserted, the cat flap can be put into the learning mode. The next time your cat walks through the flap, the unique ID code of your chip is stored. SureFlapTM now always opens when your cat wants to enter the house. This also works with several cats. Up to 32 cats can be detected by the flap at the same time. Normally, a battery will last longer than 6 months. The battery level indicator will inform you when the battery is changed. With the fourfold locking system you can lock the door in any combination for indoors and outdoors. The veterinarian mode, for example, allows your cat to enter the house, but does not let her out, so she is already in the house for the next appointment with the veterinarian.