The SureFlap Microchip Cat Flap provides your pet with a secure, stress free home. The cat flap gives your pet their own door key, unlocking only for them and keeping unwanted intruder animals out. As an animal approaches the cat flap scans for a microchip or collar tag and if an authorised pet is detected the door unlocks. For glass installations a SureFlap Cat Flap Mounting Adaptor is required. Ideal for multi-pet households. For wall installations a SureFlap Cat Flap Mounting Adaptor and SureFlap Cat Flap Tunnel Extenders may be required. These accessories are not included with the product and must be purchased separately. Compatible with all microchips or the SureFlap RFID Collar Tag (sold separately) Simple one-button programming Selective entry only any animal can leave but intruders are kept out Can be installed in doors, windows and walls (accessories may be required) Stores up to 32 pets Battery powered 4 x AA batteries which will last up to 12 months with normal use Four-way manual lock can be used to keep programmed pets in or out Low battery indicator light