1- -Protect Your Child and Pet: Toddlers are typically known for being very inquisitive and have no ability to protect themselves from dangerous situations. Window safety lock is specifically designed for children and pets, can lock dangerous places such as windows, sliding doors, balcony, etc., to prevent babies and pets from falling from the window while playing. 2- -Easy To Use: This window restrictor child safety can be installed by standard 3M VHB adhesive, not easy to fall off and will not damage the surface of the furniture, especially when you can not use the screws to install is an optimal choice. In the locking design, abandon the traditional key and password way, do not worry about dropping the key and forget the password, have a better usage experience. 3- -Adjustable Window Restrictor: No longer worry about the difficulty of controlling the opening distance. According your cat size, you can adjust the length of the chain to determine the gap size for proper ventilation while keeping your baby and cats safe inside. The gap size from 3.5 cm to 19 cm, it allows way more air flow than having the upvc window on the latch. 4- -Upgraded Protection: The dual switch unlocking mode designed specifically for children's safety requires simultaneous pressing of buttons to open the window. Adults easily open, but this can be tricky for small babies, which can provide double protection, not only can let fresh air in, but also effectively avoid the dangerous situation of children pressing one of the buttons to unlock. 5- -Widely Compatible: Made of high-quality ABS material, withstand temperature exposure, stainless steel chain, withstand up to 20kg gravity, pulling is not easy to damage. Childproof window restrictor is widely used on most UPVC, metal, wooden, casement and sliding windows. As the best choice for limiting the opening distance, it perfectly locks every danger in your home for you, never worry about the safety of your child's or pet's windows again. Material: ABS and stainless steel Weight: 60g(1pcs)