Yes. Cryptnox can hold Stader ETHx as an ERC-20 token on Ethereum after you add the token once with Add a Token, or Add a Network where the wallet view requires it. ETHx is not pre-programmed on the card. Use the Ethereum contract 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b and an Ethereum 0x-prefixed address. Private keys are generated inside the secure element and never leave it.
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Stader ETHx is held with Cryptnox as an ERC-20 token on Ethereum. The Cryptnox Crypto Hardware Wallet – Dual-Card Set does not arrive with ETHx already displayed, so the first setup task is to add the Ethereum token details once in the wallet interface. After that, ETHx is associated with the Ethereum account controlled by your Cryptnox cards.
The ETHx token contract is 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b on Ethereum. Check the contract before adding ETHx, because the chain and token contract decide which balance the wallet view displays. ETHx should be added as an Ethereum token, not as a separate chain.
For a wider asset check before adding ETHx, the Cryptnox coin and blockchain support page helps you review supported networks and tokens before you prepare an Ethereum ERC-20 transfer.
ETHx is not pre-programmed on the card, so it must be added to the app view with the Ethereum ERC-20 details. The private key controls the Ethereum account, while the token contract identifies the ETHx balance attached to that account. This is why the contract address matters as much as the visible token name.
Open the free Cryptnox app on iOS or Android and work from the Ethereum account controlled by your card. If the wallet view already has Ethereum available, use Add a Token and enter the ETHx contract. If the view first asks for the network route, use Add a Network before adding ETHx as the token.
If you want to review the app workflow before entering the ETHx contract, the Cryptnox hardware wallet tutorials provide product guidance you can follow before adding an ERC-20 token. The Stader Labs ETHx repository is a useful reference when you want to verify that you are looking at the ETHx project rather than a similarly named asset.
Your ETHx receiving address is an Ethereum address. It begins with 0x and represents a 20-byte EVM account address. When ETHx is added in the app, the token balance is tied to that Ethereum address through the ETHx contract on Ethereum.
For a buyer moving ETHx to a hardware wallet, this means the receiving address is not a new ETHx-specific address family. It is the Ethereum account controlled by the Cryptnox card. The contract tells the wallet which ERC-20 balance to display, and the secure element protects the private key that controls the account.
Private keys are generated inside the secure element and never leave it. ETHx is an Ethereum token, so control of the token balance depends on the private key for the correct Ethereum address. The app is used to view the account, add the ETHx token, and prepare activity for the card-protected account.
The card uses an EAL6+-certified chip. That certification applies to the chip, not to the finished card. For ETHx, the practical point is that your Ethereum private key is created and held inside the secure element while the ETHx balance is shown through the Ethereum token contract.
The Cryptnox Crypto Hardware Wallet – 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 from the beginning. For ETHx, that means both cards are tied to the Ethereum account that can control the ETHx ERC-20 balance.
This backup model fits an Ethereum token because ETHx itself is not stored as data on the card. ETHx is represented on Ethereum by the token contract, and access depends on the private key for the 0x-prefixed address. If one card is not available, the second card is already the backup for that same wallet.
When you add ETHx after setup, you are adding a token view for the Ethereum account. You are not creating a separate ETHx key. The paired cards continue to protect the private key that controls the relevant Ethereum address.
The Cryptnox card is a contact and NFC smart card. You can tap it to a phone or insert it into a reader. That dual-interface form factor matters for ETHx because the asset is handled through an Ethereum account while private-key control remains tied to the card.
Unlock in the Cryptnox app can use the phone’s fingerprint or face unlock. The card itself has no fingerprint reader and no face sensor. For ETHx use, that separates app access from Ethereum account control: the phone helps you open the app workflow, and the card protects the private key for the 0x-prefixed address.
If ETHx is one part of a broader hardware wallet decision, the Cryptnox hardware wallet collection explains the smart-card product family while this page keeps the ETHx setup details focused on Ethereum and the ETHx contract.
The free Cryptnox app on iOS and Android connects to Web3 through WalletConnect and works with MetaMask. For ETHx, that route still depends on the same Ethereum ERC-20 setup: the connected account should be the Cryptnox-controlled 0x address, and ETHx should be identified by the contract 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b.
When a connected application or MetaMask workflow shows the Ethereum account, ETHx belongs to that account only after the token is added and recognised as the Ethereum ERC-20 token. WalletConnect or MetaMask can be part of the connection flow, but they do not replace the need to use the correct chain, contract, and address format.
If you also manage assets that do not use the ETHx contract, keep their setup paths separate. The ETHx contract should not be used for a Bitcoin workflow, and the Cryptnox Bitcoin hardware wallet page is the better reference when the asset is Bitcoin rather than an Ethereum ERC-20 token.
ETHx on Cryptnox should be handled as an ERC-20 token on Ethereum. The practical risk during setup is entering a token on the wrong network view or confusing a similarly named asset with the ETHx contract on Ethereum.
Before receiving ETHx, verify three details together: Ethereum as the chain, ERC-20 as the standard, and 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b as the contract. If one of those details does not match, pause before using the address. The receiving address should be the Ethereum 0x-prefixed address controlled by the Cryptnox card.
Do not reuse ETHx setup details for other assets. If your next setup task is Polygon, use the Cryptnox Polygon hardware wallet page instead of entering the ETHx contract into a Polygon-focused workflow. If your next asset is Tron, use the Cryptnox Tron hardware wallet page rather than applying an Ethereum ERC-20 contract to a Tron setup. For Ronin, the Cryptnox Ronin hardware wallet page keeps that asset route separate from ETHx on Ethereum.
The product for holding ETHx with Cryptnox is the Cryptnox Crypto Hardware Wallet – Dual-Card Set. It is a pair of contact and NFC smart cards that ships uninitialised. During setup, the seed is generated inside both secure elements, so the second card is the backup for the same Ethereum wallet used to control ETHx.
Cryptnox is Swiss-engineered, and the cards are made in Switzerland. After setup, add ETHx once in the free Cryptnox app as an Ethereum ERC-20 token. Use the contract 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b, confirm the 0x address, and keep the second card stored as the backup for the same wallet.
For ETHx, the buying decision comes down to the Ethereum account and the backup model: add the correct token contract in the app, then use the paired cards to protect the private key that controls the 0x-prefixed address.
No. ETHx is not pre-programmed on the card. Add it once in the Cryptnox app as an ERC-20 token on Ethereum. Use the contract 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b and confirm that the receiving address is an Ethereum 0x-prefixed address.
Choose Ethereum. ETHx is held as an ERC-20 token on Ethereum, and the receiving address uses a 0x-prefixed 20-byte EVM format. If the wallet view asks for a token, use Add a Token. If it needs the network first, use Add a Network before adding ETHx.
The private keys are generated inside the secure element and never leave it. ETHx is an Ethereum token, so the card protects the private key for the Ethereum address that controls the ETHx balance. The app can show the token and prepare activity for the card-protected account.
The Dual-Card Set ships uninitialised. During setup, the seed is generated inside both secure elements, making the second card the backup for the same wallet. By default, you do not have to write down a recovery phrase. Importing a BIP39 recovery phrase is an advanced option.
Yes. The free Cryptnox app on iOS and Android connects to Web3 through WalletConnect and works with MetaMask. ETHx still needs to be added as an Ethereum ERC-20 token with the correct contract, because the connection method does not identify the token by itself.
No. The card has no fingerprint reader and no face sensor. Unlock can use the phone’s fingerprint or face unlock through the Cryptnox app. The card protects the private key in its secure element for the Ethereum address associated with ETHx.
Use an Ethereum address beginning with 0x. ETHx is an ERC-20 token on Ethereum, so it uses a 0x-prefixed 20-byte EVM address. Before receiving ETHx, check that the token contract is 0xA35b1B31Ce002FBF2058D22F30f95D405200A15b and that the network is Ethereum.
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.