Cat Mate Elite Super Selective Cat Door is supplied with two unique electronic I.D. tags, suitable for use with up to eight I.D. tags, controlling entry and exit through the flap to keep foreign animals away. The LCD display shows selected access and entry status, location, and time since the last flap actuation for up to three selected cats. It features a low battery status indicator and requires four AA (R6) batteries (not supplied). The timer function controls access for all your cats, such as setting a curfew at night. It has self-cladding for installation thicknesses up to 50mm, making it ideal for single or double glazing and all panels up to 50mm thick. A tunnel is available for wall installation, and the flap includes a fully airtight, weatherproof brush seal.