Ventilation and regulation - Our window limiters are adjustable, which can protect children while meeting ventilation requirements. There are two different opening sizes to choose from, 3.62 inches (9.2 centimeters) and 5.31 inches (13.5 centimeters). Press and hold the slider button on the pole, push or pull the window to adjust the opening size of the window.Why do we need it - to prevent babies from getting their hands caught when opening and closing windows without adult supervision; Prevent infants from climbing windows; Prevent toddlers from accidentally falling out of the window while learning to walk. It is not only effective for babies, but also for pets.Universal durability - made of PA66+GF20 material, the current limiter consists of two parts, sturdy and durable. Our window locks are widely used and can be used for both inside and outside windows.Installation technique - Combine screws with transparent 3M VHB adhesive to achieve optimal installation results. The transparent 3M VHB adhesive has super strong adhesion (better effect after 24 hours) and can be easily removed without any residue.Easy to operate - the limiter can be easily unlocked without the need for a key. Press the two buttons on the lock body and unlock the car window. The car window can be fully opened as usual. It is easy for adults to operate, but difficult for babies to open, providing effective protection for infants.