Product Overview

DO RFID Reader presents the MIFARE Classic 4K (S70) 13.56MHz Blank RFID Printable Card, an industrial-grade contactless smart card designed for high-volume access control, secure identification, and payment system deployment. This card integrates the NXP MIFARE Classic 4K chip with 4096 bytes of user memory, making it suitable for applications that require larger data storage per card, such as multi-zone access permissions, transit fare profiles, loyalty point balances, and biometric template storage.

System integrators, facility management contractors, transit operators, and loyalty program administrators choose this card because it offers a proven, stable 13.56 MHz solution with broad reader compatibility, standardized ISO/IEC 14443-A communication, and CRYPTO1 encryption for data protection during transmission and access control operations. The blank PVC surface accepts dye-sublimation and thermal transfer printing, enabling custom branding, employee photographs, barcodes, and serial numbers to be applied during personalization.

As a manufacturer with dedicated RFID production lines, DO RFID Reader supplies this card in bulk quantities for long-term project deployment, distributor cooperation, and OEM customization. Buyers benefit from batch consistency, fast lead times, and stable production capacity that supports both scheduled replenishment and urgent project deadlines.

Key Features

• NXP MIFARE Classic 4K Chip: 4096 bytes of user memory organized into 40 sectors (32 sectors of 4 blocks and 8 sectors of 16 blocks), providing greater storage capacity for multi-application cards.
• 13.56 MHz Operating Frequency: Globally accepted HF band with read range up to 10 cm depending on reader antenna geometry and environment.
• ISO/IEC 14443-A Compliance: Ensures compatibility with the majority of installed RFID readers, NFC-enabled devices, and access control terminals worldwide.
• CRYPTO1 Encryption: Hardware-based encryption protects data transmission and prevents unauthorized cloning or tampering during access control and payment transactions.
• 4-Byte UID: Unique identifier per card supports simple card recognition without requiring additional file system setup.
• 106 kbps Data Transfer Rate: Fast enough for transit gate passage, door entry, and loyalty card swipes without perceptible delay.
• Durable PVC Construction: Waterproof, flexible, and resistant to daily wear in high-traffic environments such as office turnstiles, factory floor entrances, and public transit validators.
• Printable Blank Surface: Compatible with Zebra, Epson, Canon, and other dye-sublimation or thermal transfer card printers for on-demand personalization.
• Factory Default Key: A/B key set to FF FF FF FF FF FF for immediate programming and integration.

Technical Specifications

Industrial Applications

The MIFARE Classic 4K card serves commercial and institutional environments where reliable contactless identification and data storage are required.

• Access Control Systems: Deployed in office buildings, industrial facilities, data centers, and gated communities. The 4K memory allows storage of multiple access profiles, time zone restrictions, and elevator floor permissions on a single card.
• Transit and Fare Collection: Used by public bus, metro, and light rail operators for stored-value ticketing, monthly passes, and concession cards. Fast 106 kbps transfer rate supports high-throughput gate lines during peak hours.
• Loyalty and Membership Programs: Retail chains, fitness clubs, and hospitality groups issue these cards as reusable loyalty media with points balance, member tier, and expiration data stored directly on the chip.
• Employee and Student ID Badges: Schools, universities, and corporations combine printed photo identification with contactless chip functionality for door access, library borrowing, cafeteria payments, and attendance tracking.
• Parking Management: Gated parking facilities issue cards for monthly subscribers, with parking entitlements and time allowances stored in the card memory for offline validation.
• Event and Exhibition Access: Temporary badges for conferences, trade shows, and sporting events benefit from low unit cost and rapid personalization using blank card printing.

OEM / ODM Manufacturing Support

DO RFID Reader provides OEM and ODM services for system integrators, access control manufacturers, and software developers who require customized card specifications.

• Chip Programming: Cards can be pre-programmed with specific sector structures, access keys, and data files according to the buyer’s application requirements.
• Custom Printing: Blank cards accept full-color logo printing, serial numbering, barcode encoding, and holographic overlays for brand identity and anti-counterfeiting.
• Packaging Options: Bulk packs of 200, 600, or 1000 pieces per box, with custom labeling and packaging design for distributor resale.
• Protocol Customization: Support for custom sector allocation and key structure to match existing backend systems or proprietary access control platforms.
• Compatibility Assurance: Pre-shipment testing with common readers such as ACR122U and other ISO/IEC 14443-A terminals to verify read/write performance.

Factory Production Advantages

Procurement teams and project managers require supply reliability, consistent product quality, and responsive support. DO RFID Reader operates as a dedicated RFID card manufacturer with the following capabilities.

• Stable Production Capacity: Multiple production lines capable of handling orders ranging from sample quantities to full container loads without interruption to existing schedules.
• Batch Consistency: Rigorous process control ensures that cards from different production lots maintain identical electrical characteristics, print quality, and mechanical dimensions.
• Fast Lead Time: Standard blank card orders ship within 5–7 working days. Custom-programmed and printed orders are scheduled based on complexity with transparent timeline communication.
• Quality Inspection: Each production batch undergoes visual inspection, memory functionality testing, read range verification, and encryption performance checks before packaging.
• Long-Term Supply Partnership: Volume pricing, scheduled monthly releases, and consignment stocking arrangements are available for distributors and integrators with ongoing project pipelines.
• Export Experience: Cards are packed for international shipment with appropriate packaging to prevent bending, scratching, or moisture damage during transit.

Bulk Supply & Project Deployment Support

Large-scale RFID deployments require predictable pricing, consistent inventory availability, and technical coordination. DO RFID Reader supports wholesalers, system integrators, and project contractors with the following commercial structures.

• Tiered Volume Pricing: Unit price decreases with order quantity. Orders of 200 pieces, 600 pieces, and 1000 pieces receive progressively lower per-card pricing. Higher volumes are quoted individually.
• Project Pre-Supply: For phased deployments, cards can be supplied in batches according to the project timeline, with pricing locked at the initial order date.
• Compatibility Verification: Sample cards can be provided for testing with the buyer’s readers and middleware before full production begins.
• Replacement Buffer: A percentage of overrun is included in bulk orders to cover damaged cards during personalization or installation, reducing project delays.
• Distributor Programs: Resellers and distributors receive dedicated account management, marketing material support, and priority allocation during peak production periods.
• System Integration Support: Technical documentation including memory map templates, key structure examples, and reader compatibility notes is provided to reduce integration time.

Frequently Asked Questions

What is the difference between MIFARE Classic 1K and MIFARE Classic 4K?
The MIFARE Classic 4K provides 4096 bytes of user memory organized into 40 sectors, compared to 1024 bytes in 16 sectors for the 1K version. The 4K card is suitable for applications requiring larger data storage, such as multiple access profiles, biometric templates, or combined transit and loyalty applications.

Can these cards be printed with a standard ID card printer?
Yes. The blank PVC surface is compatible with dye-sublimation and thermal transfer printers from manufacturers including Zebra, Epson, Canon, and Fargo. Printing does not affect chip functionality when standard printing temperatures and pressures are used.

Are these cards compatible with NFC smartphones?
MIFARE Classic 4K cards operate at 13.56 MHz and comply with ISO/IEC 14443-A. Many NFC-enabled Android devices can read and write to MIFARE Classic cards using compatible apps. iOS devices have limited native support for MIFARE Classic and may require specific reader hardware.

What readers work with this card?
Any reader that supports ISO/IEC 14443-A at 13.56 MHz and MIFARE Classic protocol, including the ACR122U, contactless smart card readers from major access control brands, and custom reader modules used in transit and payment systems.

Can the factory pre-program the cards before shipping?
Yes. OEM orders can include pre-programming with custom sector keys, data files, and memory structure. Contact DO RFID Reader with your specific programming requirements for a custom quotation.

What is the minimum order quantity for bulk pricing?
Tiered pricing begins at 200 pieces. For larger projects, volume pricing is available at 600 and 1000 pieces. Orders exceeding 1000 pieces receive further discounts and can be scheduled for phased delivery.

Contact for Specifications and Pricing

For OEM customization requests, bulk supply quotations, project cooperation, or distributor inquiries, contact DO RFID Reader at info@dorfidreader.com. Provide your application details, required quantity, and delivery timeline for a tailored proposal.