Prevent misreads & scan failures. Proprietary Waffle Technology removes both dust & residual magnetization from just about any POS or security card reader. Individually wrapped & easy-to-use, all it takes is a single swipe to keep your systems glitch-free. Application: Card Readers; Applicable Material: Metal; Plastic; Dirt Types: Dust; Remanence; Residual Magnetism; Scent: Unscented.