Yes. Cryptnox can hold pufETH as an ERC-20 token on Ethereum after you add the token once with contract 0xD9A442856C234a39a81a089C06451EBAa4306a72. pufETH is not pre-programmed on the card. You receive it at a 0x-prefixed 20-byte EVM address controlled by the Cryptnox card. Private keys are generated inside the secure element and never leave it, and the second card in the Dual-Card Set is the backup.
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pufETH is held on Cryptnox through the Ethereum token route. It is not a separate chain profile and it is not turned on before you set up the card. After your Ethereum account is available in the Cryptnox app, you add pufETH as an ERC-20 token using contract 0xD9A442856C234a39a81a089C06451EBAa4306a72.
The asset detail that matters most is the Ethereum contract. The pufETH token page on Etherscan lists that contract on Ethereum, and the Puffer Finance pufETH repository is a project source for pufETH. Cryptnox uses the Ethereum account controlled by your card; the token entry tells the wallet interface which ERC-20 balance to show for that account.
If you are checking whether pufETH fits within a wider Cryptnox setup, the Cryptnox coin and blockchain support page is the place to review supported networks and token routes before you move funds.
The pufETH setup is a manual token addition. You add it once through Add a Token or Add a Network, depending on the wallet view you are using, then use the Ethereum account controlled by the card. The card does not need a pufETH-specific edition, because the token is addressed through Ethereum and its ERC-20 contract.
A buyer holding pufETH should treat the contract address as the setup anchor. If the token does not appear automatically in a wallet view, add the Ethereum contract rather than searching for a separate physical product or a separate network. Once the token entry is present, the receiving address remains the Ethereum address controlled by the Cryptnox card.
Before making a first transfer, the Cryptnox hardware wallet tutorials are useful for reviewing card setup, app use, and transaction flow with the Dual-Card Set.
pufETH is an ERC-20 balance associated with an Ethereum address, so access depends on the private key for that address. In the Cryptnox Crypto Hardware Wallet – Dual-Card Set, private keys are generated inside the secure element and never leave it. The pufETH token entry can be added to a wallet interface, but the Ethereum private key remains in the card’s secure element.
The card uses an EAL6+-certified chip. For pufETH, that chip is relevant because the card signs for the Ethereum account that holds the ERC-20 token. The app can display pufETH, request a transaction, and connect to Web3 tools, but the private key is not exported to the phone.
When you receive pufETH, the sender uses your 0x-prefixed Ethereum address. When you later interact with that account, Cryptnox keeps signing tied to the card-controlled key. The token contract and the wallet interface identify the pufETH balance; the secure element controls the Ethereum key that authorizes account activity.
The card itself has no fingerprint or face sensor. Approval uses the phone’s Face ID or fingerprint check through the Cryptnox app where the phone supports that flow. For pufETH use, that keeps the phone as the interface while the Ethereum private key stays inside the card.
The Dual-Card Set ships uninitialised. During setup, the seed is generated inside both secure elements, so the second card is the backup for the same wallet. That matters for pufETH because the ERC-20 token sits at an Ethereum address; the backup card preserves access to that same card-generated Ethereum account.
There is no recovery phrase to write down by default. The normal setup path is card-to-card backup inside the Dual-Card Set. Importing a BIP39 recovery phrase of 12 or 24 words is available as an advanced option, but that is not the default way a new Dual-Card Set is created.
For a pufETH owner, the practical point is simple: the backup is not a separate pufETH account. It is the second card for the same wallet account created during initialization.
The free Cryptnox app is available on iOS and Android. For pufETH, the app is where you manage the card-controlled Ethereum account and add the ERC-20 token entry. When the app asks for the card, you tap the contact and NFC smart card to a phone or insert it into a contact smart card reader.
Cryptnox connects to Web3 through WalletConnect and works with MetaMask. In a pufETH workflow, that means the card-controlled Ethereum account can be used through those wallet connection routes while pufETH remains the ERC-20 token at contract 0xD9A442856C234a39a81a089C06451EBAa4306a72.
The token route does not change between these options. pufETH remains an Ethereum ERC-20 token, and the account address remains a 0x-prefixed EVM address controlled by the Cryptnox card.
Before receiving pufETH, confirm that the destination is your Cryptnox-controlled Ethereum address and that the address begins with 0x. pufETH is not received as a native asset on a separate pufETH chain. It is received as an ERC-20 token on Ethereum at the contract address used when you add the token.
The safest first step is to separate the account from the display. The Ethereum address is the account controlled by the card. The pufETH token entry is the wallet display item that points to the ERC-20 contract. If the token display is missing, the account can still be the same Ethereum account; add the token entry with the correct contract before relying on the visible balance.
If pufETH is one part of a larger hardware wallet plan, you can review the broader Cryptnox card range through the best crypto hardware wallet hub and then buy the Cryptnox Crypto Hardware Wallet – Dual-Card Set from the product page.
pufETH belongs in the Ethereum side of a Cryptnox setup. That distinction is useful when one card-controlled wallet is used for more than one type of holding. pufETH needs the Ethereum account, the ERC-20 standard, the token contract, and the 0x-prefixed address format; assets from other networks may require different address and network checks.
A buyer who also holds TRX should review Cryptnox hardware wallet information for Tron, because Tron is not the same route as an Ethereum ERC-20 token. A buyer who also uses POL-related activity can compare that with Cryptnox hardware wallet information for Polygon, where the network context differs from pufETH on Ethereum.
The same wallet buyer may also want separate checks for Ronin hardware wallet support or Bitcoin hardware wallet support. For pufETH, keep the decision anchored to Ethereum: add the pufETH ERC-20 token once, use the correct contract, and receive to the card-controlled 0x address.
The Cryptnox Crypto Hardware Wallet – Dual-Card Set is a fit for pufETH when you want a physical smart card to control the Ethereum account, a second card as the backup, and an ERC-20 token entry added by contract. It is not a pufETH-preloaded card. You set up the cards first, then add pufETH to the Ethereum account view.
The cards are Swiss-engineered contact and NFC smart cards. For pufETH, that gives you two practical ways to present the same card: tap it to a phone during app use, or insert it into a contact smart card reader. The account remains the same Ethereum account in either case.
The buying case is strongest when your pufETH requirement is specific: hold an Ethereum ERC-20 token at contract 0xD9A442856C234a39a81a089C06451EBAa4306a72, keep the private key inside the secure element, and rely on the second card from the set as the backup. If that is the setup you want, the Dual-Card Set is the Cryptnox product to choose.
No. pufETH is not pre-programmed on the card. Add it once as an Ethereum ERC-20 token using contract 0xD9A442856C234a39a81a089C06451EBAa4306a72. After the token is added, you use the Ethereum account controlled by your initialized Cryptnox card set.
pufETH uses Ethereum and the ERC-20 token standard. The receiving address is a 0x-prefixed 20-byte EVM address. For Cryptnox, that means you receive pufETH to the Ethereum account controlled by the card, not to a separate pufETH-only address format.
Add pufETH on Ethereum with contract 0xD9A442856C234a39a81a089C06451EBAa4306a72. This contract is the token entry used to show pufETH for the card-controlled Ethereum account. Check the contract carefully before receiving or interacting with the token.
The Dual-Card Set ships uninitialised, and the seed is generated inside both secure elements during setup. The second card is the backup for the same wallet account. For pufETH, that means it backs up access to the Ethereum account that can hold the ERC-20 token.
No. The default Dual-Card Set setup creates the seed inside both secure elements, making the second card the backup. Importing a BIP39 recovery phrase of 12 or 24 words is an advanced option, not the normal setup path for a new Cryptnox card set.
No. The card itself has no fingerprint or face sensor. Unlock approval uses the phone’s Face ID or fingerprint check through the Cryptnox app where the phone supports it. The private key for the Ethereum account remains inside the card’s secure element.
Yes. The free Cryptnox app on iOS and Android connects to Web3 through WalletConnect and works with MetaMask. pufETH still follows the same support route in those workflows: Ethereum, ERC-20, contract 0xD9A442856C234a39a81a089C06451EBAa4306a72, and a 0x-prefixed address.
No, and on this network that is not a limitation. The Cryptnox wallet uses one address per chain. HD address rotation comes from Bitcoin’s UTXO model and the BIP32/BIP44/BIP49/BIP84 derivation scheme; on account-model networks each account is a single fixed address by design, so the question does not apply in the same way. Cryptnox’s single-address-per-chain behaviour matches how these networks work.
At the cryptography layer the card derives keys along BIP32 and SLIP-10 paths, one path per supported chain, though that is not exposed in the app as multi-address management.
Yes. Cryptnox ships worldwide from the official CRYPTNOX store. Orders to Switzerland, the European Union and the United States are dispatched from stock already held in each of those regions, so the parcel does not cross a customs border into your country and there are no import duties to pay. Orders to other destinations are shipped internationally, and any import duties or local taxes are set by the destination country and are the recipient’s responsibility. Current shipping rates are shown at checkout.