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- for Arduino vs Shield
Micro-Bitcoin for Arduino vs Specter Shield
What for Arduino does better (0) and where Shield wins (2) — every spec side by side.
vs
7.4Open source5.9
Why is for Arduino better than Shield?
for Arduino has no measurable advantages in this pair.
Why is Shield better than for Arduino?
- Open-source firmwareNo · for Arduino: Yes
- Reproducible buildsNo · for Arduino: Yes
Specifications
Side by side
| Security | ||
| Secure Element chip | — | Yes |
| Air-gapped signing | — | Yes |
| 100% air-gapped | — | Yes |
| Supply-chain & tamper protection | — | Yes |
| Secure boot | — | Yes |
| Anti-klepto (anti-exfil) signing | — | No |
| Firmware & open source | ||
| Open-source firmware | No | Yes |
| Source code available | Yes | Yes |
| Reproducible builds | No | Yes |
| Firmware licence | — | MIT |
| Upgradable firmware | Yes | Yes |
| Firmware update via | — | microSD |
| Bitcoin-only firmware / edition | — | Yes |
| Device lock | ||
| PIN lock | — | Yes |
| PIN entered on the device | — | Yes |
| Fingerprint unlock | — | No |
| Duress PIN / decoy wallet | — | No |
| Brick / wipe PIN | — | No |
| Wipe after failed attempts | — | Yes |
| Time-delayed unlock | — | No |
| Anti-phishing words | — | Yes |
| Keys & backup | ||
| BIP39 passphrase | — | Yes |
| Shamir backup (SLIP-39) | — | No |
| Seed XOR | — | No |
| BIP85 child seeds | — | Yes |
| 24-word seed | — | Yes |
| SeedQR backup | — | Yes |
| microSD backup | — | Yes |
| NFC backup card | — | Yes |
| User-added entropy (dice) | — | Yes |
| Stateless use (no stored keys) | — | Yes |
| Multiple seeds on one device | — | No |
| Bitcoin features | ||
| Multisig | — | Yes |
| Taproot | — | Yes |
| Miniscript | — | Yes |
| Message signing | — | Yes |
| Coin control | — | Yes |
| Own node connection | — | Yes |
| Tor support | — | Yes |
| Replace-by-fee | — | Yes |
| Silent Payments | — | No |
| Spending limits | — | No |
| Testnet | — | Yes |
| Supported assets | ||
| Altcoins & tokens | — | No |
| Bitcoin only | — | Yes |
| Connectivity | ||
| Signing connectivity | — | USB, QR code, microSD |
| USB | — | Yes |
| USB-C | — | No |
| Bluetooth | — | No |
| NFC | — | No |
| QR code camera | — | Yes |
| Animated QR (UR) | — | Yes |
| microSD signing | — | Yes |
| Screen & input | ||
| Screen | — | Yes |
| Screen size | — | 4″ |
| Screen type | — | LCD |
| Screen resolution | — | 800 × 480 |
| Touchscreen | — | Yes |
| Colour screen | — | Yes |
| Gorilla Glass | — | No |
| Controls | — | Touch Screen |
| QWERTY keyboard | — | Yes |
| Battery & power | ||
| Built-in battery | — | Yes |
| Battery capacity | — | 1,400 mAh |
| Removable battery | — | Yes |
| Wireless charging | — | No |
| Design | ||
| Weight | — | 248 g |
| Length | — | 134 mm |
| Width | — | 67 mm |
| Thickness | — | 26 mm |
| Materials | — | Plastic |
| Water / dust resistance | — | No |
| Several colours available | — | Yes |
| DIY build possible | — | Yes |
| Apps | ||
| Official apps | — | Windows, macOS, Linux |
| Desktop app | — | Yes |
| Mobile app | — | No |
| Works with wallet apps | — | Bitcoin Safe, Wasabi, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, BlueWallet, Bitcoin Keeper, Bull, Liana |
| Compatible third-party wallets | — | 11 |
| Other features | ||
| FIDO2 / U2F security key | — | No |
| Password manager | — | No |
