Humidity Range: Maintain optimal humidity levels effortlessly with our electronic hygroscopic card, designed to keep humidity between 25% and 55%. Simply monitor the built-in humidity meter, and if levels rise above 60%, recharge the card to restore its effectiveness. Large Size, Leakage Guard: Measuring approximately 138x98x33mm (5.43x3.86x1.30in), this large-sized hygroscopic card is equipped with a leakage guard device, ensuring safe and secure use by effectively preventing any electrical leakage. Superior Performance: Engineered with high-efficiency special hygroscopic materials, this electronic hygroscopic card offers a unique combination of moisture absorption and regeneration. Its hidden power push plug design is both space-saving and loss-preventing, allowing for wet absorption without the need for plugging in and eliminating any thermal effects. Wide Use: The electronic hygroscopic box is incredibly versatile, ideal for protecting a variety of items from moisture damage. Use it to store cameras, camcorders, computer diskettes, audiovisual products, stamps, photographs, fine instruments, and within sealed cabinets or containers to ensure they remain dry and in perfect condition. Premium Material: Constructed from durable ABS material, this card is designed for longevity and repeated use. It features breathable holes to effectively dissipate heat, enhancing safety and power efficiency. Environmentally friendly and non-polluting, it offers variable wet absorption times according to different items, with an average recharge cycle lasting 2-3 weeks.