Phishing & rogue dapps
Approval prompts arrive faster than you can read them. A single misclick on a malicious site can empty a balance — unless a card tap stands between the prompt and the signature.
Wats Wallet NFC Hardware Security Card — Buy Online
In production · Shipping worldwide
The Key to the
WATS World.
Wats Wallet NFC security card. Tap-to-approve every transfer, swap, bridge, and login — a physical second factor your phone alone can't bypass. 304 stainless steel and plastic. No battery, no wear, lifetime durable.
- Shipping
- $15
- Lead time
- 5–8d
- Auth layer
- Tap-2FA
- Guarantee
- 2y
§ 02 / Rationale
Wallet attack vectors
A signed transaction is a final transaction.
An unlocked phone or a hijacked session can drain a wallet in seconds — once a transaction is broadcast on-chain it is irreversible. The card adds a physical step every signature must pass through: no card, no signature, no loss.
Clipboard hijacking
Malware swaps the recipient address at paste time. Without a physical confirmation step the swap goes unnoticed; the card forces you to look again before the chain accepts the send.
Stolen or unlocked device
If your phone is unlocked, your wallet is unlocked. The card stays in your physical possession, so a lost or borrowed phone alone cannot move funds.
§ 03 / Protocol
Operational procedure
A three-step protocol.
Pair the card once. After that every transfer, swap, bridge, and login inside the Wats Wallet waits for a tap before it signs. The card never transmits private keys.
01
Configure order
Select a set and card design. No store account required. Shipping and billing are collected by the payment processor.
02
Pair with the app
Open the Wats Wallet mobile app, tap the card on the back of your phone via NFC, and link it to your wallet. The pairing happens locally on the device.
03
Tap to approve
From this point on, every send, swap, bridge, and login asks for a card tap. The phone holds the keys; the card holds your final say.
§ 04 / Materials
Plastic · Steel
Two materials. Distinct use cases.
Both offer the same level of security and technology. The choice is governed by how long the card must survive and how much environmental stress it must withstand.
Plastic series
Direct printed
Lightweight, discreet, affordable. The everyday card for daily approvals, with a backup copy or two for redundancy.
- Water
- Resistant
- Fire
- Not rated
- Thickness
- 0.8 mm
- Chip
- NTAG216
- Frequency
- 13.56 MHz
- X-ray protection
- Resistant
Use case — daily approvals, first card, replacement copy.
Flagship
Steel series
UV Printing on Steel
UV printing on 304 stainless steel. Fire, water, and time-resistant. Built for high-value wallets where the card must outlive every phone that ever held the app.
- Water
- IP68
- Fire
- 1,500°C rated
- Thickness
- 1.2 mm
- Chip
- NTAG216
- Frequency
- 13.56 MHz
- X-ray protection
- Shielded · steel housing
Use case — high-value wallets, long-term holders, single-card setups.
§ 05 / Activation
Mobile companion · iOS & Android
Paired through the Wats Wallet app.
The cards ship blank and inactive. The Wats Wallet mobile app pairs them with your wallet via NFC and stores the link locally. From that moment on, every send, swap, bridge, and login waits for a tap.
9:41
Wats · v2.4
Tap card to pair
Hold the card flat against the back of your phone.
WW · 03P
Searching · NFC
Cancel Listening
Download
Get the app, then pair any card.
Keep your card on you. Tap it on the back of your phone to approve every transfer, swap, bridge, or login you initiate inside the Wats Wallet. The card is a passive NFC device — it never reveals private keys, it only confirms that you are physically present.
01
Install the Wats Wallet app
Free on iOS and Android. Create a Wats Wallet account inside the app — only the hot wallet bound to that account understands the card.
02
Tap your card to pair
NFC-tap the card on the back of your phone. The app reads its serial and binds it to your wallet on the device.
03
Approve every move
From now on every transfer, swap, bridge, and login in the Wats Wallet asks for a card tap before it signs.
Requires NFCPhones without NFC cannot pair with Wats Wallet cards. The card stays non-functional on such devices. Confirm NFC support before ordering. NFC is a standard feature on the iPhone 7 and later models, as well as on most modern Android phones.
Open source · MITIndependent audit · Q1 2026No telemetry
§ 06 / Decision
Selection matrix
Choose by priority.
Pick the priority that matters most. We'll point you to the matching configuration.
§ 07 / Order
Three-step configuration
Configure your order.
No account creation. Shipping and billing details are collected by the payment processor on the final step.
// Available configurations
Loading…§ 08 / FAQ
Questions, answered
Frequently asked questions.
What the Wats Wallet NFC card is, how it pairs with the mobile app, and the practicalities of materials, shipping and payment — answered before you order.
01What is the Wats Wallet NFC card?
What is the Wats Wallet NFC card?
It's a credit-card-format (ISO/IEC 7810 ID-1, 85.6 × 53.98 mm) passive NFC device that pairs with the Wats Wallet mobile app and acts as a physical second factor (2FA). Every transfer, swap, bridge, and login inside the app's hot wallet waits for a tap of this card before the wallet signs. The card body is anonymous, with no branding or markings.
02Is the Wats Wallet card a cold wallet, and does it store my private keys?
Is the Wats Wallet card a cold wallet, and does it store my private keys?
No. It is not a cold-storage hardware wallet and it never stores private keys or seed phrases. The keys stay inside the Wats Wallet mobile hot wallet; the card only confirms your physical presence with a tap-to-approve and never transmits keys. Think of it as a tap-to-approve 2FA key for your existing hot wallet, not a place where coins live.
03Does the card need a battery or charging?
Does the card need a battery or charging?
No. The card is fully passive and draws power from the phone's NFC field only at the moment of approval. There is nothing to charge, no firmware to update, and nothing inside that wears out.
04Can the card be cloned, hacked, or skimmed?
Can the card be cloned, hacked, or skimmed?
The card never exposes anything worth stealing because it never holds or transmits private keys. It is a passive NTAG216 device on the 13.56 MHz NFC band whose only job is to confirm you are physically present, and the wallet won't sign without that tap. Even if someone scanned it, they could not move funds without your phone and your unlocked wallet.
05Which phones work with it — does it work with iPhone?
Which phones work with it — does it work with iPhone?
Yes, it works with iPhone and Android phones that have NFC. NFC is standard on iPhone 7 and later and on most modern Android phones. Confirm your phone supports NFC before ordering, because the card stays non-functional on devices without it.
06What is the difference between the steel and plastic cards, and which should I choose?
What is the difference between the steel and plastic cards, and which should I choose?
Both share the same NTAG216 chip, the same security, and the same ISO ID-1 dimensions, so the choice is about durability. The 304 stainless steel card is UV-printed, water-rated to IP68, fire-rated to 1,500°C, 1.2 mm thick and x-ray shielded by its steel housing, from $149.90 — best for high-value or single-card setups. The engineered plastic card is direct-printed, water-resistant (not fire-rated), 0.8 mm thick and x-ray resistant, from $54.90 — ideal for daily approvals and backup copies.
07What happens if I lose the card?
What happens if I lose the card?
Nothing moves on its own — because the card never holds your keys, a lost card alone cannot move funds; someone would also need your phone and your unlocked wallet. Recover access through the Wats Wallet app, and order more than one card so a backup is always paired and ready. The quick reference in the box lists the recovery steps.
08How long does shipping take and how is it packaged?
How long does shipping take and how is it packaged?
Lead time is 5–8 business days, and worldwide shipping is a flat $15. Every parcel ships in plain, unmarked packaging with no logo and no reference to the product. Taxes and duties are not included.
09What is the return and refund policy?
What is the return and refund policy?
There is a 14-day return policy, with returns sent back by mail. If a parcel is refused on delivery, the order is automatically refunded. Note that taxes and duties are not included in the price.
10Do I need to create an account to order?
Do I need to create an account to order?
No store account is required and there is no KYC. Shipping and billing details are collected only on the final checkout step and forwarded to the payment processor. You order as a guest.
11Which payment methods are supported?
Which payment methods are supported?
Payment is in USDT on Binance Smart Chain (BEP-20) only. The server generates a unique deposit address bound to your specific order, and you have a 20-minute window to send the exact amount. No store account and no KYC are required.
12What is the Wats Wallet app, and is it private?
What is the Wats Wallet app, and is it private?
The Wats Wallet app is a free mobile hot wallet for iOS and Android that the card pairs with, and it requires NFC (iPhone 7+ and most modern Android phones). It is open source under the MIT license, sends no telemetry, operates offline, and has an independent audit scheduled for Q1 2026. Pairing happens locally on the device and the card's serial never leaves your phone.