Feature: 1. ACCESS CONTROL: Allow pets wearing the sensing collar to freely enter and exit while you are away, preventing wildlife from accessing your cat's food and ensuring peace of mind for pet owners. 2. USER FRIENDLY LOCKING SYSTEM: After plugging in, each press of the M button automatically switches the locking direction of the pet door and emits a sound alert, making operating intuitive and simple. 3. QUICK MODE SWITCHING: Choose from 4 distinct modes, electronic pet door supports Lock, Unlock, In Only, or Out Only, ensuring you complete control over your pet's access to your home. 4. SMART MODE ACTIVATION: After setting the desired unlocking mode with the M button, activate smart mode. The door automatically unlocks for pets with collars within a 7.5inch range, locking again once they pass through. 5. IDEAL FOR MULTI PET HOMES: In households with multiple pets, only those wearing the designated sensing collars can pass through, ensuring that other pets remain secure and preventing unwanted entries or exits. Specification: Item Type: Smart Pet Door Material: Plastic Size: Approx. 30 x 26.3 x 8.9cm / 11.81 x 10.35 x 3.5in Pet Door Battery: 4 x AA batteries (batteries not included) Remote Control Battery: 210mAh Battery (built in battery). Package List: 1 x Pet Door 1 x Remote Control 1 x User Manual 2 x Sensor Tag 2 x Sensor Tag Holders 1 x Hanging Rope 8 x Screws 4 x Accessories