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.