What Is NFC? A Simple Guide for Non-Technical Professionals
| Technology | Lets Connect
NFC is the same technology behind Apple Pay and Google Wallet. In business cards, it lets you share your professional profile with a simple tap — no app needed.
NFC — Near Field Communication — is the technology that lets you tap your phone against a contactless payment terminal, a train barrier, a hotel door, or an NFC business card and have something happen instantly. In business cards it lets a passive chip inside the card send your profile URL to a phone the moment they touch. There is no app, no pairing and no typing.
If you already know what NFC is and just want the card, jump to our NFC business cards or the software-only digital business card profile.
What NFC actually is
NFC is a short-range wireless standard (ISO/IEC 14443 and 18092) operating at 13.56 MHz. It descends from the older RFID technology used in warehouse tags, but adds two-way communication and works at a much shorter range — roughly 4 cm — which makes it deliberate, safe and easy to use for one-to-one interactions.
A basic NFC chip has no battery. The reader (your phone) generates a small magnetic field; the chip harvests that energy, powers up for a fraction of a second and sends its payload back. That's why an NFC card never runs out of charge and doesn't need software updates.
Where you already use NFC every day
- Apple Pay and Google Wallet — tap-to-pay at any contactless terminal
- Contactless bank cards — the same chip is inside your Visa or Mastercard
- Transport passes — Oyster, TfL, MTA, Suica, OV-chipkaart
- Hotel room keys — tap-to-enter systems replacing magstripe cards
- Office access cards — modern building fobs and lanyards
- NFC business cards — tap-to-share a full profile
If contactless payment works on your phone, NFC business cards work too — same radio, same behaviour.
How an NFC business card works, step by step
- You hand a card to a contact
- They hold their phone near the card (within ~4 cm; the exact "sweet spot" is usually the back-top of the phone)
- The phone's NFC reader energises the chip
- The chip transmits a URL — for example letsconnect.business/yourname
- The phone displays a small banner: "Open in Safari" or "Open in Chrome"
- Your profile page loads, showing name, role, contact buttons, socials, portfolio
- They tap Save Contact and you are in their address book
On iPhone XS and newer, iOS reads NFC tags in the background — no need for the contact to open any app or wake the phone from a specific screen. On Android the behaviour is similar as long as NFC is switched on in Settings.
Key technical facts
Property | Value
Frequency | 13.56 MHz
Range | ~4 cm
Read time | Under 1 second
Power source | Phone (chip is passive)
Storage on chip | 504 bytes (NTAG215) — enough for a URL
Rewritable | Yes, up to 100,000 times
Lifespan | 10+ years typical
iOS support | iPhone 7 and later
Android support | Virtually all devices from 2016 onward
Why NFC is well suited to business cards
Deliberate. The 4 cm range means an exchange only happens when you both intend it — no accidental broadcasts to strangers on the train. Simple. No pairing dialog, no Bluetooth prompt, no "install our app". The interaction feels magical because it isn't complicated. Durable. No battery to die, no moving parts to wear out. Drop the card in a puddle and it still works. Editable. The chip stores only a URL. Update your profile online and every card you've handed out reflects the change instantly.For a fuller walk-through of the physical mechanics, see our companion piece on how NFC business cards work. If you're comparing it against QR codes, our NFC vs QR breakdown covers when each wins.
Frequently Asked Questions
Does an NFC business card need a battery?
No. The chip is passive — it draws power from the phone that reads it. That's why NFC cards can last a decade or more with no maintenance.
Does NFC work if my contact's phone is locked?
On most modern iPhones (XS and later) and Android devices, yes — NFC reads tags in the background even from the lock screen. Older devices may need to be unlocked first.
Can NFC be hacked or intercepted?
In practice, no. The 4 cm range makes remote interception effectively impossible, and Lets Connect cards only store a public profile URL — never sensitive data. See our NFC security explainer for detail.
Do I need to install an app to receive an NFC business card?
No — that is the whole point. The phone opens the profile in the standard browser. Only the sender needs an account (to edit the profile).
Can NFC business cards be reprogrammed?
Yes. The chip inside a Lets Connect card is rewritable up to about 100,000 times, though for most users the URL never changes — you just edit the profile online.
Ready to try it?
Order an NFC business card and see how it feels in real conversations. If you'd rather start free, spin up a digital business card profile and add the physical card later — they share the same dashboard.
Further reading: How NFC business cards work · NFC business card security features · NFC vs QR codes for business cards