Laser Lens Cleaner for CD DVD Bluray Players with Voice Instructions and Music is a microfiber brush cleaning system that is designed to remove dust and dirt that may cause disc skipping or reading problems. This is also important for maintaining perfect sound and video quality. The lens cleaner is recommended for use every 8 hours of play or every 3 to 4 weeks. It needs to be replaced when the brushes become dirty, worn or damaged. Cleans and Protects Your CD DVD and Blu Ray Players. Dry cleaning system with microfiber brushes. For CD, DVD & Blu-ray players. Each Package comes with 1 unit Laser Lens Cleaner for CD DVD Bluray Players. Pictures may be magnified to show detail. For further information on size, color, conditions please refer to the item description or please ask a question before buying.