What Is a Dual-Frequency RFID Card?

A dual-frequency RFID card combines two radio-frequency technologies in one physical card. Each interface communicates with a compatible reader system according to its chip, antenna design and communication protocol.

This approach is useful for projects that need to support different identification or access-control environments without issuing separate physical credentials for every system.

The correct card configuration depends on the frequency pair, chip type, reader protocol and application requirements. A dual-frequency card does not automatically work with every RFID reader; each interface must match the intended system.

Kaisere Technology supports dual-frequency card projects with configuration options designed around the required radio interfaces, card construction and personalization requirements.

Available Frequency Combinations

LF + HF: 125 kHz + 13.56 MHz

A low-frequency and high-frequency card combines a 125 kHz LF interface with a 13.56 MHz HF interface in one card body.

This configuration is suitable for projects that need to accommodate compatible low-frequency identification systems alongside HF smart-card applications.

The LF and HF interfaces use different chip technologies. For example, e5551-family RFID ICs operate in the low-frequency range, while MIFARE Classic contactless ICs operate at 13.56 MHz.

Typical application areas include compatible access-control installations, employee identification and multi-system credential projects.

HF + UHF: 13.56 MHz + 915 MHz

An HF+UHF dual-frequency card combines a 13.56 MHz interface with a UHF interface configured for a nominal 915 MHz operating frequency.

This combination supports system designs that use HF for close-range card interactions and UHF for longer-range identification workflows.

UHF operation follows the selected chip, reader protocol and regional frequency requirements. The practical reading range depends on the card antenna, reader equipment, installation environment and operating configuration.

This configuration is suitable for selected identification, parking and vehicle-management projects that use compatible HF and UHF infrastructure.

HF + 2.4 GHz: 13.56 MHz + 2.4 GHz

An HF+2.4 GHz configuration combines a 13.56 MHz interface with a 2.4 GHz wireless interface for systems designed around those two technologies.

The implementation, compatible reader equipment and communication functions depend on the selected 2.4 GHz architecture. This interface is distinct from a conventional 860–960 MHz UHF RFID interface.

Buyers should specify the reader or system platform, operating requirements and intended application when requesting this configuration.

Technical Specifications

The main card dimensions and material options follow the existing product specification. Frequency-dependent performance is specified for the selected card configuration rather than represented by one universal reading-distance figure.

The selected chip, protocol and antenna design determine the electrical performance of each interface. Data retention, write endurance and transaction timing are chip-specific characteristics, so they should be stated in the technical specification for the selected configuration.

Card thickness and detailed dimensional tolerances are defined in the product drawing for the chosen construction.

Applications of Dual-Frequency RFID Cards

Access Control and Employee Identification

Dual-frequency cards can support access-control projects involving different reader technologies. The selected interfaces allow system designers to plan credentials around the requirements of compatible access-control infrastructure.

For employee identification projects, card printing and personalization can support visual identification alongside electronic card functions.

Vehicle Management and Parking

Selected HF+UHF or HF+2.4 GHz configurations can support vehicle-management applications that use compatible identification infrastructure.

System integrators should match the card interface with the installed readers, antenna arrangement and software platform to obtain the intended identification performance.

Transportation and Membership Programs

Dual-frequency card designs can be considered for transportation credentials, membership programs and other identification applications requiring more than one compatible interface.

Chip memory, security features and application functions depend on the selected IC and system architecture.

Multi-System Identification Projects

Organizations operating more than one RFID system can use dual-frequency cards to consolidate compatible identification functions into a single card design.

The appropriate configuration depends on the frequency pair, chip requirements, existing reader infrastructure and the way the card is used.

Customization and OEM Manufacturing

Kaisere Technology supports customization for OEM buyers, RFID system integrators, smart-card purchasers, brands and distributors.

Card Materials and Construction

Choose from available PLA, PVC, ABS, PET and PETG material options according to the project design, card construction and operating environment.

Card dimensions, thickness, antenna arrangement and material selection are coordinated with the selected dual-frequency configuration.

Printing and Personalization

Customization options include card artwork, logos, visual identification elements and other project-specific printing requirements.

Serial numbers, barcodes, QR codes and card personalization can be incorporated into the production specification where required.

Chip Configuration and Encoding

Chip selection is based on the required frequency combination and reader system.

Encoding requirements should define the necessary identifiers, data format and personalization workflow. Secure application data and authentication functions depend on the capabilities of the selected IC and the host system.

OEM Project Support

For an efficient quotation, provide your intended frequency combination, reader model, required quantity, card artwork, encoding requirements and delivery destination.

This information helps align the proposed card construction, production process and commercial quotation with your project requirements.

Factory Capability and Production Capacity

Kaisere Technology supports RFID card and tag manufacturing projects through product configuration, card construction, printing, personalization and production coordination.

The company's manufacturing resources support a range of RFID product categories, including cards, tags, labels and customized products.

Company-level manufacturing information includes:

lApproximately 10,000 m² of factory area

lMultiple RFID production lines

lStated overall monthly production capacity exceeding 12 million RFID cards and tags

lManufacturing and export experience dating back to 2003

lCustomers and export markets across more than 100 countries

These figures describe the company's overall manufacturing and export operations, rather than a guaranteed monthly output for one dual-frequency card configuration.

Production scheduling and lead time for an individual order depend on its chip configuration, materials, printing, encoding, order quantity and current production plan.

Quality Control and Production Consistency

Quality control is organized around the agreed card specification and project requirements.

Key inspection areas include:

1. Material and component control: confirming the materials and chip configuration used for the order.

2. Card construction: checking the card body and manufacturing quality.

3. RF functionality: evaluating the specified frequency interfaces with compatible readers and test equipment.

4. Printing and encoding: checking personalization and data accuracy against the order requirements.

5. Final inspection: checking product appearance, quantity, packaging and order documentation before shipment.

For projects with specific acceptance criteria, buyers can define the required inspection items and sample-approval process in the product specification.

This process provides a clear basis for evaluating samples, approving production and reviewing completed orders.

Product Documentation and Compliance

Technical documentation should match the selected chip, frequency combination and destination market.

Product-related documentation can include the applicable chip datasheet, communication-protocol information, dimensional drawing, performance specifications and available quality records.

For UHF configurations, regional frequency requirements and reader settings are part of the system specification. For HF configurations, buyers should identify the required communication standard and chip family.

Security functions such as authentication, protected memory and cryptographic operations depend on the actual IC and application architecture. Dual-frequency operation alone does not establish a particular security level.

Buyers with mandatory standards, testing or documentation requirements should include those requirements in the RFQ so the appropriate product configuration and supporting documents can be specified.

From Sample Approval to Bulk Production

Kaisere Technology supports a structured workflow for dual-frequency card projects.

Step 1 — Define the Requirements

Provide the frequency pair, chip preferences, reader model, intended application, quantity and personalization needs.

Step 2 — Select the Configuration

Align the frequency interfaces, chip types, card construction and required technical functions with the intended RFID system.

Step 3 — Review the Sample

Evaluate the card construction, printing, encoding and RF functionality using the intended reader environment and agreed acceptance criteria.

Step 4 — Confirm the Production Specification

Document the approved chip configuration, artwork, card dimensions, encoding rules, inspection requirements and packaging details.

Step 5 — Produce and Inspect the Order

Manufacture the cards according to the agreed specification and perform the applicable production and final inspection procedures.

Step 6 — Prepare International Delivery

Coordinate packaging, shipping documentation, destination requirements and delivery arrangements according to the order.

This workflow helps establish consistent technical and commercial expectations from the initial enquiry through bulk delivery.

Global Shipping and Export Support

Kaisere Technology supports international RFID product orders for overseas B2B customers, distributors and system integrators.

Shipping arrangements are coordinated around the destination country, order quantity, packaging requirements, delivery schedule and applicable trade terms.

For a more accurate quotation, please provide:

lDestination country and delivery postcode

lRequired order quantity

lPackaging and labeling requirements

lRequested delivery date

lAny special shipping or documentation requirements

The quotation can then address the card configuration, production requirements and international delivery arrangements as part of the overall project.

Frequently Asked Questions

1. What is a dual-frequency RFID card?

A dual-frequency RFID card combines two radio-frequency interfaces in one card body. The supported functions depend on the selected chip configuration, antenna design, communication protocols and compatible reader systems.

2. Which frequency combinations are available?

The product page describes LF+HF, HF+UHF and HF+2.4 GHz configurations. Each combination uses a different technical architecture and is specified according to the requirements of the intended RFID system.

3. Can a dual-frequency card work with existing access-control readers?

Compatibility depends on the chip type, operating frequency, communication protocol, reader hardware and application configuration. Providing the reader model and existing card specifications helps identify the appropriate configuration.

4. What is the reading distance of a dual-frequency RFID card?

Reading distance depends on the selected chip, antenna geometry, frequency interface, reader equipment and operating environment. LF, HF, UHF and 2.4 GHz interfaces must be specified separately rather than assigned one universal reading-distance figure.

5. Which chip options can be used?

Chip selection depends on the frequency combination and system requirements. HF options can use compatible 13.56 MHz contactless ICs, while LF and other wireless interfaces require their corresponding chip technologies.

6. What materials are available for customization?

Available card materials listed for this product include PLA, PVC, ABS, PET and PETG. Material selection, thickness and card construction are coordinated with the selected configuration and project requirements.

7. Can you provide OEM printing and encoding?

OEM services can include card artwork, logo printing, personalization and project-specific encoding according to the agreed specification. Include the required data format and personalization details when submitting an enquiry.

8. What is the MOQ and production lead time?

MOQ and lead time depend on the selected chip configuration, materials, customization, order quantity and production schedule. Include the estimated quantity and required delivery date in your RFQ for a project-specific quotation.

9. Can I request samples before placing a bulk order?

Sample requests can be discussed before bulk production. Specify your reader model, frequency combination, personalization requirements and sample quantity to support a meaningful technical evaluation.

10. What information should I provide for a quotation?

Provide the required frequency pair, chip preference, reader model, card dimensions, quantity, printing or encoding requirements and delivery destination. These details allow the supplier to define the product configuration and quotation scope.