Directional locking mode---The pet door can be adjusted to 4 modes through the labeled red and green switches: out only, in only, both in and out, fully locked, easily control the entry and exit of pets. br>Size application---External size 25*23.5*5.5cm High quality---Made of ABS material, weather-resistant, smooth and durable surface. Provides retaining slots with weatherproof wiper strip clips to securely secure the wiper strip. Even if the brush strip comes off, it can be easily put back into its retaining groove. This greatly helps the brush strips reduce noise and provide maximum protection against raindrops, wind or pests such as mosquitoes. Easy to install---Instruction manual included in the sales box and step-by-step installation instructions in the installation demonstration video. Reference, pay attention and prepare the necessary tools for easy installation according to your needs. Tunnel depth can be reduced depending on your installation needs. Applicable scenarios---Suitable for installation on indoor doors, outdoor doors, walls, windows, cabinets, glass, etc.