An RFID copier—often called a reader/writer or duplicator—helps you interact with compatible cards and key fobs. On this page you’ll see devices for 125kHz (low-frequency) and 13.56MHz (NFC/high-frequency) tags. Typical functions include:

• Read: Capture basic ID data from supported cards or fobs.
• Write/clone: Program blank, writable tags (e.g., common LF rewritable chips or NFC blocks) when permitted.
• Program: Set up test tags for systems you manage.
• Verify: Identify tag frequency and chip type.

Compatibility depends on the card’s chip and security. Encrypted, rolling-code, or proprietary credentials typically aren’t supported by entry-level tools. Always review the product’s supported frequencies and tag types, and use these tools only with authorization.

Rules vary by location and by who owns the access system. As a general guide:

• Get permission: Only duplicate credentials you own or have clear authorization to copy.
• Use responsibly: Common legitimate uses include replacing your own fob, testing a system you administer, or programming lab/test tags.
• Check policies: Workplaces, apartments, and campuses may prohibit duplication—even if you have the physical card.
• Protect data: Store credentials securely and dispose of unneeded copies safely.

Unauthorized copying can violate laws or terms of service. If you’re unsure, contact the system owner or seek professional guidance. Walmart offers hardware for lawful, authorized use—please follow all applicable rules.

Smartphones and RFID tags interact in specific ways:

• NFC (13.56MHz): Most modern phones can read simple NFC tags and, with apps, write basic records to compatible tags.
• 125kHz (low-frequency): Phones generally don’t support these tags, so a dedicated handheld or USB reader/writer is typically needed.
• Secure badges: Encrypted or rolling-code access credentials aren’t designed to be cloned by phones.

For quick NFC projects—like scanning or writing simple data—your phone can be convenient. For low-frequency ID cards or more advanced programming, consider a dedicated reader/writer from this category and always follow authorized-use policies.

iPhones support NFC for reading tags and using supported services. Many models can read common NFC data and, with appropriate apps, write simple NDEF records to compatible tags. Keep these points in mind:

• Frequency limits: iPhones operate at 13.56MHz (NFC) and don’t read 125kHz tags.
• Access control: Cloning or emulating secure building credentials isn’t supported and may be restricted by card security.
• Authorized use: Always follow your organization’s policies before programming or duplicating any credential.

For tasks beyond basic NFC reading/writing, a dedicated RFID reader/writer can provide broader compatibility.

Match the device to your tags and workflow:

• Frequency support: Choose 125kHz for many low-frequency ID cards/fobs, 13.56MHz for NFC/high-frequency tags; some units handle both.
• Chip compatibility: Look for support for the specific tag families you use (e.g., common LF rewritable chips or NFC UID/blocks). Encrypted systems aren’t broadly supported.
• Form factor: Handheld units are portable; USB models pair with a computer for more control.
• Included media: Kits with blank cards or key fobs make testing easier.
• Software/OS: Confirm operating system and driver requirements in the product details.

Review each product’s specs and customer Q&A to ensure a safe, authorized fit for your project.