The Trixie 4-Way Electromagnetic Pet Door offers selective access for your cat while keeping unwanted animals outside. This system exclusively recognizes your pet through the included collar magnet and automatically opens the flap upon approach. The transparent flap operates quietly and features a special seal with a magnetic closure to reduce drafts and noise. With an integrated tunnel element, this pet door is suitable for installation in walls and doors with thicknesses ranging from 10 to 35 mm and can be extended with additional tunnel elements for thicker walls. The device operates on a 9-volt battery (not included). Made from durable plastic, the pet door measures 21.1 cm x 24.4 cm externally, with an inner opening of 16.5 cm x 21.6 cm and a flap size of 14.7 cm x 15.8 cm. The electromagnetic access control ensures that only your pet can use the flap, providing safety and convenience. The clear flap allows for visibility while maintaining privacy, and the magnetic seal creates an effective barrier against weather elements. Installation requires consideration of wall thickness, with the base unit accommodating standard dimensions and optional extensions available for thicker walls. This product offers a reliable solution for pet owners seeking controlled access for their animals between indoor and outdoor areas. The design focuses on functionality with particular attention to noise reduction and energy efficiency through the sealing system. Proper installation according to the specified dimensions ensures optimal performance and longevity of the pet door mechanism.