This product simply attaches to the window glass of a building (on the inside) using magnets. There is absolutely no need for extensive installation work, such as drilling holes in walls, as is required with traditional outdoor cameras. Even in rented accomodation, there is no need to worry about restoring the property to its original condition, and you can start using it straight away. As the camera unit is mounted on the inside of the window, it is protected from rain and dust, so there is no need to worry about water or dust resistance. Furthermore, the lens and body can be cleaned safely from inside, significantly reducing the maintenance burden.