A baby security window lock is a device that is designed to prevent children from opening windows and potentially falling out. 

It is installed onto the window frame and can be locked and unlocked using a key or a combination lock. 

The lock is typically made of durable materials such as metal or plastic and is easy to install. 

It provides an extra layer of safety for families with young children and can give parents peace of mind knowing that their child is safe from potential accidents.