Yes. Cryptnox supports Convex Finance CVX as a user-added ERC-20 token on Ethereum, using contract 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B. CVX is not pre-programmed on the card, so add it once through the relevant Add a Token or Add a Network flow. The receiving address is an 0x-prefixed 20-byte EVM address. The Ethereum private key for that CVX address is generated inside the secure element and never leaves it.
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Convex Finance CVX is held with Cryptnox as CVX ERC-20 on Ethereum. The card does not ship with a preloaded CVX entry, so setup starts with an Ethereum account and a one-time token addition. Use the CVX contract 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B, the Ethereum token contract shown for CVX on Etherscan.
The Cryptnox Crypto Hardware Wallet – Dual-Card Set controls the Ethereum account used for the CVX token balance. CVX is not a separate Cryptnox card account and not a separate CVX chain in this setup; it is an ERC-20 balance attached to an Ethereum 0x address.
For a wider view of token and network routes, the Cryptnox coin and blockchain support page explains how Ethereum tokens fit alongside other assets supported through Cryptnox.
CVX must be added once before you expect the balance to appear in the wallet view. In the flow you use, that may mean choosing Add a Token and entering the CVX contract, or using an Add a Network path before the token is visible through a connected wallet interface. In either case, the CVX route remains Ethereum ERC-20.
Do not treat CVX as a native coin with its own address format. The receiving address for this setup is the Ethereum address controlled by the Cryptnox card, written as an 0x-prefixed 20-byte EVM address. The token contract identifies which ERC-20 balance belongs to that address.
This matters because a CVX balance is read from Ethereum token data, not from a pre-programmed CVX slot on the card. Once the token is added, the same Ethereum address can show ETH and the user-added CVX ERC-20 balance associated with that address.
The security boundary for CVX is the Ethereum private key that controls the 0x address holding the ERC-20 token. With Cryptnox, that private key is generated inside the secure element and never leaves it. The connected phone or wallet interface can prepare the Ethereum token action, but the key for the CVX-holding address remains inside the card.
The card uses an EAL6+-certified chip. For a CVX holder, the relevant point is that the Ethereum key used to sign ERC-20 transfers is created and retained in that secure element, rather than being exported to the phone or browser used to view the token balance.
When you approve or send CVX through an Ethereum wallet flow, the request concerns the 0x address controlled by the card. The card signs from inside the secure element for that address. The token contract tells the Ethereum wallet interface which CVX balance is involved; it does not change where the Ethereum private key is held.
Unlocking through the Cryptnox app uses the phone’s face or fingerprint unlock. The card itself has no fingerprint sensor. For CVX, that means the phone can help open the app flow, while the private key that can sign for the CVX-holding Ethereum address stays in the secure element on the card.
The Dual-Card Set ships uninitialised. During the normal setup for the Ethereum account that will hold CVX, the seed is generated inside both secure elements. The second card is therefore the backup for the same Ethereum address, including the CVX ERC-20 balance associated with that address.
There is no recovery phrase to write down by default. For a CVX buyer, that changes the usual first step: instead of creating a paper backup before sending a token balance, you complete the two-card setup and store the second card as the backup for the Ethereum account.
Importing an existing BIP39 recovery phrase is an advanced option, but it is not the default CVX setup. The default route creates the seed inside both card secure elements, so the backup card is prepared before CVX is received at the Ethereum 0x address.
The second card should be stored as the backup for the Ethereum address, not as a separate CVX account. CVX remains an ERC-20 token balance connected to that one Ethereum address.
The free Cryptnox app is available on iOS and Android, connects to Web3 through WalletConnect, and works with MetaMask. For CVX, this is relevant because the token is handled through an Ethereum wallet connection while the card controls the Ethereum address used for signing.
Convex Finance documentation describes CVX as part of the Convex Finance system. When an Ethereum interface asks to display or use CVX, the contract address identifies the token balance, and the Cryptnox-controlled Ethereum address is the account involved in the action.
The Cryptnox hardware wallet tutorials help with product setup and connection flows before you move CVX to the Ethereum address. Completing setup first is important because the CVX token entry only matters after the Ethereum address and its backup card are ready.
The connected wallet interface is the display and connection layer. The Cryptnox card remains the signing device for the Ethereum address that holds CVX.
The CVX setup uses a contact and NFC smart card. You can tap the card to a phone, or insert it into a reader, when the Ethereum account needs to be used. That dual-interface format is useful when the same CVX-holding Ethereum address may be viewed on mobile and used through an Ethereum wallet connection.
CVX does not change the card form factor. The token is an ERC-20 balance on Ethereum, and the card is brought into the flow when the Ethereum address has to sign. The phone or connected wallet interface can show the CVX token entry after it has been added, but the card is the device that protects the Ethereum key.
If you are comparing how Cryptnox handles different networks and tokens, the Cryptnox hardware wallet collection gives the broader product context. CVX belongs to the Ethereum ERC-20 route, so its setup depends on the Ethereum network, the CVX contract, and the 0x address format.
For a CVX transfer, the user-facing wallet flow prepares an Ethereum ERC-20 action. The card interface is used when that Ethereum action needs a signature from the address controlled by the secure element. Tapping to a phone or inserting into a reader is the physical step that connects the smart card to the signing flow.
CVX on this setup means CVX ERC-20 on Ethereum. If a withdrawal or wallet flow presents another network, do not assume it is the same route. The Cryptnox CVX path on this page is the Ethereum token contract 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B and an Ethereum 0x address controlled by the card.
That distinction is especially important when you also use other networks. The hardware wallet for Polygon page concerns Polygon network use, while CVX here is specified as the Ethereum ERC-20 token. The hardware wallet for Tron page concerns Tron, which is not the Ethereum CVX route described here.
For BTC, use the hardware wallet for Bitcoin page instead of applying ERC-20 token assumptions. For Ronin network use, the hardware wallet for Ronin page covers a separate route. CVX remains tied to Ethereum in this setup.
Once you have confirmed that your intended CVX route is Ethereum ERC-20, use the Cryptnox Crypto Hardware Wallet – Dual-Card Set for the two-card setup. After setup, add the CVX contract, confirm the Ethereum 0x address, and only then use that address for the CVX balance.
No. CVX is not pre-programmed on the card. Add it once as an ERC-20 token on Ethereum using contract 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B. The CVX balance is then associated with the Ethereum 0x address controlled by the Cryptnox card.
Use Ethereum for this CVX setup. CVX is held as an ERC-20 token on Ethereum, and the receiving address is an 0x-prefixed 20-byte EVM address. The token contract to add is 0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B.
The Ethereum private key that controls the CVX-holding address is generated inside the secure element and never leaves it. The connected phone or wallet interface can display the ERC-20 token balance and prepare the Ethereum action, but the card protects the key and signs from inside the secure element.
The Dual-Card Set ships uninitialised. During normal setup, the seed for the Ethereum address that can hold CVX is generated inside both secure elements, so the second card is the backup. There is no recovery phrase to write down by default.
Yes. The free Cryptnox app is available on iOS and Android, connects to Web3 through WalletConnect, and works with MetaMask. CVX still needs to be added as an Ethereum ERC-20 token before the balance is expected to appear for the card-controlled address.
No. For CVX use, the Cryptnox app can use the phone's face or fingerprint unlock, but the card itself has no fingerprint sensor. The card's role is to protect the Ethereum private key that controls the 0x address holding CVX.
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.