SpecterDIY / stateless signing device

Specter Shield

Name: Specter Shield
Brand: Specter

Specter Shield is a DIY / stateless signing device released in November 2020. Key specs: secure element chip, open-source firmware, air-gapped signing, signing connectivity USB, QR code, microSD.

9.2Score

Security7.2

Open source5.9

Bitcoin features5.2

Ease of use9.2

Connectivity4.6

price range€400–500

Full specifications

Released: November 2020
Type: DIY / stateless signing device
Brand: Specter
Popularity: #15 of 141

YesSecure Element chip

YesOpen-source firmware

YesAir-gapped signing

USB, QR code, microSDSigning connectivity

4″Screen size

YesBuilt-in battery

248 gWeight

Spec guide

How it ranks among DIY signing devices

Spec guide

Screen size · 4″Top 8%Weight · 248 gBottom 5%

Compared with every model of this kind in the catalog.

Specifications

Full specifications

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: Yes
Source code available: Yes
Reproducible builds: Yes
Firmware licence: MIT
Upgradable firmware: 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