It cleans screens of mobile phones,laptops,computers,cameras and etc.It is a really cute little promotional item! Easy to carry and can be used to clean the screens of mobile phones, laptops, computers, cameras and etc. Wire or keychain can be available for you to attach the cleaner to your cell phone. The most popular size is 1-3/8 inch dia. Many styles and colors are available and can be customized.Welcome to contact with us and customize.