Fangrui Product Details Ventilation Adjustment - Our Window Restrictors Are Adjustable And Can Protect Children While Meeting The Function Of Ventilation. And Hold The Slider Button On The Pole To Push Or Pull The Window, Achieving The Adjustment Of The Openging Size For . Why Need It - Prevent Babies From Pinching Their Hands By Opening And Closing Without The Supervision Of Adults; Prevent Babies From Climbing On ; Prevent Toddlers From Accidentally Falling Out Of . It Is Effective Not Only For Babies, But Also For Pets. Universal - Made Of Abs+pc Material, Window Restrictors Are Strong And With Two Parts. Our Window Locks Have A Wide Range Of Application, And Can Be Used For Inner Opening And Outer Opening . Installation Tips - The Screws And Transparent Adhesive Are Combined To Achieve The Installation Effect. Transparent Adhesive Has Super Stickiness (the Effect Is Better After 24 Hours.), And Can Be Easily Removed Without Any Residue. Easy Operation - Window Restrictors Can Be Easily Unlocked Without The Need Of A