- Safe and thoughtful design: The transparent flap lets the pet see through the cat flap. The 4-way locking provides full control with options for entrance only, exit only, both directions, or fully locked. - High quality and weatherproof: Made of weatherproof ABS plastic with a smooth, durable surface. It features a fixed groove with pressure tabs for a weatherproof brush strip; the brush strip can be easily reinserted if it loosens. This setup helps reduce noise and blocks rain, wind, and pests such as mosquitoes. - Size and applications: Frame size 9.6" x 8" x 1.2" (H x W x D); inner height 15 cm and inner width 14.7 cm. The cat flap/tunnel is suitable for installation in windows, doors, cabinets, panels and thin walls, etc. - Switching modes: Four modes: only output, only input, input and output, and fully locked. Easy to track your pet's movements and provides your cat with freedom and independence to go in or out.