Protect children and pets. This window guard securely locks windows, sliding doors, and balconies, protecting children and pets from dangerous environments. It prevents your child or pet from accidentally falling – making it an essential safety product for any household with children or pets. 1. Protect children and pets. This window guard securely locks windows, sliding doors, and balconies, protecting children and pets from dangerous environments. It prevents your child or pet from accidentally falling – making it an essential safety product for any household with children or pets. 2. Multifunctional combination lock: Constructed from ABS and steel wire, it features a 3-digit combination lock. The default combination is \"000\". This mechanism prevents sliding doors and windows – which are easily accessible to children – from being opened, protecting children from harm. 3. Easy installation: Thanks to powerful 3M VHB adhesive, this window guard is remarkably easy to install. It offers two mounting options: adhesive or screw fastening. Simply remove the protective film and attach the safety lock to a clean, dry surface – it adheres firmly after 24 hours.