These window screens are applied to the outside of your vehicle window. Visibility from inside is unaffected, but you can't see in from the outside. They can go on rear or side windows. You can use the rear defroster and windshield wiper, but not an ice scraper! They ship to you with installation instructions. Prices vary depending on vehicle and window. Call or email me with your year, make and model, and which window. Because the shape of each window varies, finding the right photo is key.