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• It is a small, lightweight product offering the protection of a portable steel vault.
mystery product revealed
National Envelope, Uniondale, N.Y., presents Smart Card Guard, a unique, cost-effective line of lightweight card sleeves and mailing envelopes that shield electronic information when mailed and carried in purses, wallets and pockets. The company developed the product by incorporating “Faraday cage” technology—a metallic barrier blocking electronic transmissions—within a lightweight, easy-to-print paper created specifically for National Envelope.
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