Feature: 100% brand new and high quality. Efficient, Safe, Pure, Convenient, The product is a cleaning product composed of ultra-pure solvents, additives and composite materials with strong adsorption capacity. It uses high-tech production technology for processing. It can quickly and safely remove dust, oil and other dirt on precision electronic equipment, electronic instruments, instruments and parts, and can effectively prevent program confusion, abnormal operation, control failure, performance degradation, circuit board corrosion, etc. caused by dust intrusion. harm. Specification: Product Type: Cleaning Card Packing size: (app.) 115x80x43mm / 4.53x3.15x1.69inch Uses: Transportation, Bank, Securities, Industry and commerce,Taxation,Post and telecommunications, Public safety,Insurance, Energy, Electricity, Education, Health... Quantity: 50 Pcs Notes: Usage: tear open the packaging bag and cut open the mouth, take out the cleaning card, insert the card reader into the card slot, you can enter the automatic cleaning state Usage guide: 2-3 times a day in a high-density dust environment; 1-2 times a day in a medium-density dust environment; 1 time a day in a low-density dust environment Note: Do not approach fire or heat sources during use Transition: 1 cm = 10 mm = 0.39 inches Due to manual measurement, please allow an error of 0-1 cm. Make sure you don't mind bidding. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you! The package includes: 50 X Cleaning Card