The LensPen LapTop Pro is a double-sided cleaning tool. On one side, you'll find an optical-grade chamois with a built-in non-liquid cleaning compound. On the reverse side there are two brushes - one that removes small dust particles from the LCD screen and the other that cleans the keyboard. The ultra-soft chamois is designed to eliminate dust and fingerprints from the screen. The two other brushes should be used to remove dirt particles from the inside of your keyboarrd.