> For the complete documentation index, see [llms.txt](https://keypal.gitbook.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://keypal.gitbook.io/en/user-manual/keypal-2/tutorial/features.md).

# KeyPal 2 Main Features Overview

A More Professional Hardware Wallet Designed for Users.

### **Product Introduction**

**KeyPal 2** is a professional-grade hardware wallet product developed by the TokenPocket team. It integrates a high-security dual-chip architecture, a camera module supporting QR code signing, NFC mnemonic backup/recovery, and multiple hardware security mechanisms. Compared with the previous generation KeyPal Plus, KeyPal 2 achieves comprehensive upgrades in security, usability, and interaction, designed specifically for crypto asset holders who pursue more professional and safer solutions.

<figure><img src="https://1097923530-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVKafggIi43De3eRpDPwS%2Fuploads%2FcJ3fpy0JpQ2JBRg9dO6u%2FKeyPal%202.png?alt=media&amp;token=52448046-6fa2-4fb1-a94a-fac0fd2f7baa" alt="" width="563"><figcaption></figcaption></figure>

### **✨ Key Features**

#### **🔐 1. Triple-Core Chip Architecture, Building the Strongest Hardware Security System**

KeyPal 2 is equipped with three independent chips internally, each responsible for different functional domains, isolated yet working together for protection:

* Main Control Chip MCU (GD32F470): Handles OS operations, interaction logic, and function scheduling.
* Security Chip SE (THD89): Used to generate and store mnemonics, supports signing, non-readable, non-writable, non-exportable.
* Bluetooth Chip (nRF52832): Dedicated to BLE communication, preventing the main control layer from leaking any sensitive information.

💡 Encrypted communication channels between chips fully block malicious firmware injection and physical attacks.

#### 📸 2. EIP-4527 QR Code Signing, Supporting Multi-Chain Offline Signature Scenarios

KeyPal 2 comes with a built-in high-performance camera, supporting QR code interaction protocols (such as EIP-4527), enabling completely offline QR code data transmission and signing:

* Supports Bitcoin, Solana, TRON, and EVM multi-chain QR code signing.
* Works with the TokenPocket App and plugin wallets supporting the 4527 QR code protocol, ensuring cold-hot isolation.
* QR code wallet address display, adapting to mainstream Web3 scenarios (such as DApp, Swap, Bridge, NFT, etc.)

#### 🔄 3. NFC Mnemonic Recovery & Offline Backup

KeyPal 2 features NFC backup/recovery mechanisms, supporting touch-based backup/import of mnemonics via KeyPal Card:

* Compatible with BIP39 mnemonic standard.
* Quick recovery without manual input.
* Mnemonics are processed only within the SE chip, fully isolated throughout the proces.
* PIN code encryption.

#### 🔢 4. 15-Key Interaction Design, Supporting Faster and More Accurate Input

Adopts a 5×3 keypad layout, offering a more flexible and secure PIN and mnemonic input experience:

* Supports quick input of letters and numbers.
* Independent NFC and camera switch buttons.
* More efficient and secure interaction input.

#### 📱 5. Multi-Channel Connection Support, Compatible with Mainstream Wallet Ecosystems

KeyPal 2 supports the following connection methods:

* QR Code Interaction (AirGap): Supports wallets using EIP-4527 QR code protocols.
* Bluetooth (BLE): For pairing with TokenPocket App, iOS/Android devices.
* USB Connection: For firmware upgrades.

Compatible with:

* TokenPocket App (Android / iOS / Chrome Extension).
* MetaMask (via QR protocol).
* All wallets or Web applications that meet signature standards.

#### 🌐 6. Comprehensive Coin and Network Upgrade Support

* Supports BTC, ETH, TRON, BNB, SOL, DOGE, EVM ecosystem and other mainstream blockchains and tokens.
* Firmware upgrades continuously add support for new networks and assets.

#### 🔒 7. Factory Anti-Counterfeiting and Identity Verification Mechanism

* Each KeyPal 2 device contains a unique certificate issued by the official authority, recorded in the SE chip.
* With the TokenPocket App, users can perform online authenticity checks to prevent counterfeit devices from non-official channels.

#### ⚙️ 8. Other Technical Specifications

<table data-header-hidden><thead><tr><th width="237.4444580078125" align="center"></th><th align="center"></th></tr></thead><tbody><tr><td align="center"><strong>Item</strong></td><td align="center"><strong>Specification</strong></td></tr><tr><td align="center">Chip</td><td align="center">GD32F470 (MCU) + THD89 (SE) + nRF52832 (Bluetooth)</td></tr><tr><td align="center">Display</td><td align="center">2.0-inch Color LCD Screen</td></tr><tr><td align="center">Camera</td><td align="center">Built-in QR Code Module (Supports EIP-4527)</td></tr><tr><td align="center">Communication</td><td align="center">QR Code / Bluetooth 4.1 / USB (HID)</td></tr><tr><td align="center">Battery</td><td align="center">500mAh Rechargeable Lithium-ion Battery</td></tr><tr><td align="center">Material</td><td align="center">Engineering Polymer</td></tr><tr><td align="center">Size</td><td align="center">86.5 × 54.5 × 8.1 mm</td></tr><tr><td align="center">Weight</td><td align="center">Approx. 43.4 g</td></tr><tr><td align="center">Language Support</td><td align="center">Traditional Chinese / Simplified Chinese / English / Japanese / Korean / French / Spanish</td></tr><tr><td align="center">Protocol Support</td><td align="center">BIP32 / BIP39 / BIP44 / EIP-4527</td></tr></tbody></table>

#### 🧩 9. KeyPal 2 Internal Structure Overview and Detailed Analysis

<figure><img src="https://1097923530-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVKafggIi43De3eRpDPwS%2Fuploads%2FOYfMMKk1oiVqEIcNtMWM%2F%E8%8B%B1%E6%96%87.png?alt=media&amp;token=ea7a804c-1b80-4fb5-b7b9-7978fe1bf6c9" alt=""><figcaption></figcaption></figure>