Baby: 2 cable vents Designed for child safety, limits window opening distance, safe ventilation. Perfect for window and door security. High-quality material: Made of PVC, wood, aluminum and metal, always tested according to standards. Easy installation: Can be easily installed on windows with four screws. Limits how much a window can be opened. Can be removed from one end with the key, windows can be fully opened. Flexible 19 cm (visible) cable allows you to open your window approx. 10-19 cm to effectively prevent children from causing accidents due to the window opening too much, to prevent pinching and cats can finally enter/exit without fully opening the door or window or locking themselves in the house! Included keys: Can be locked and unlocked in seconds. Fits all materials: Suitable for most types of windows and small doors. Screws included. Always consider the safety of children such as your doll, pets, son, daughters etc. Are you still worried about your children's safety at home? Are you thinking about precautions against burglary? Our product is applicable to almost all windows and patio doors and they are easy to install. For hinged windows, tilt windows, tilt and turn windows. Used in hospitals, hotels, homes and schools etc.