This is a disposable product designed to clean the interior contact points of electronic devices . These Waffletechnolgy cleaning cards are designed to easily and safely maintain devices without opening the equipment or damaging critical sensors. The spring loaded waffles on our cards reach and safely add pressure to sensors, effectively cleaning them. They remove dirt, dust, oils and other contaminants in a safe, efficient manner. Cleaning cards are used to ensure overall device efficiency and for preventing expensive maintenance and replacement costs by eliminating or minimizing failed transactions. Cleans devises with card readers like EMV / Chip & Pin Readers, POS Terminals, ATM Machines, Pay at the Pump Card Readers, Vending Machines, and Hotel Door & Key Card Readers. Studies have proven that many devices aren't broken, they are just dirty. This listing is for 240 cleaning cards.