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Custom Printed 13.56MHz Leather Waterproof NFC Chip Keychain for Business. Waterproof Leather Design: Durable leather keychain with waterproof feature for business use. Long Data Storage Life: Data retention capability exceeds 10 years for reliable storage. Multiple Color Options: Available in Red, Black, Green, Blue and other custom colors. ISO14443A Protocol: Compatible with standard ISO14443A RFID communication protocols. 13.56MHz Frequency: Operates at standard 13.56MHz frequency for NFC applications. OEM and Logo Support: Factory supports OEM services and custom logo branding. Full Money Refund: Full refund guarantee if products do not match the description. Fast Stock Delivery: Shipping time is 3-5 working days for items in stock.