Recommended pairing
Your SeedSigner keeps your keys offline. The NovaSapienBTC Self-Custody Kit gives you everything around it: quality materials chosen for best practice, so you can set up with confidence knowing every detail has been considered.
$134 when added to this order (usually $149). Save $15
$195.00
Not sure which to choose? SeedSigner Premium v3 is the complete device, available preassembled or as a DIY kit. v1 is the enclosure only, for builders who want to source and assemble their own parts. See v1 →
The SeedSigner Premium v3 features a precision-machined aluminum enclosure for enhanced durability and professional finish, while delivering the same core air-gapped, stateless security. Built around a Raspberry Pi Zero v1.3 (the version without WiFi or Bluetooth). NovaSapien’s online self-custody courses provide step-by-step guidance accessible even for users with no technical background—take your time with the courses to build a solid understanding. Seedsigner.com and its Telegram channel offer additional community support. $195.
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The SeedSigner Premium v3 combines the open-source, air-gapped SeedSigner architecture with a high-quality aluminum enclosure for improved durability, heat dissipation, and refined appearance. Built around a Raspberry Pi Zero v1.3 (the version without WiFi or Bluetooth hardware), it maintains complete air-gapping and stateless operation—private keys exist only in RAM during signing and are erased on power-off.
Entropy generation is user-controlled via dice rolls or camera noise. Transaction signing uses QR codes exclusively, with full support for BIP-39 passphrases, custom derivation paths, and multisig coordination.
This SeedSigner can be purchased together with the NovaSapien Self-Custody Kit – Sovereign Backup System for a complete, best-practices self-custody solution.
NovaSapien’s online self-custody courses offer detailed, step-by-step instructions accessible even for users with no technical background. We strongly recommend taking your time with the courses to build a thorough understanding of key generation, secure storage, and signing practices before proceeding. Official documentation and tutorials are available at seedsigner.com, and the SeedSigner Telegram channel provides community support.
SeedSigner is an open-source, air-gapped Bitcoin signing device based on a Raspberry Pi Zero v1.3. It generates seed phrases, restores wallets, and signs transactions via QR codes, with no persistent storage of private keys or internet connectivity.
Preassembled units are fully built; flash the official OS image to the included microSD card. DIY versions supply components for user assembly. Both have identical functionality; DIY offers supply-chain control.
Stateless design (keys in RAM only, erased on power-off), full air-gapping (QR codes only—no USB, Bluetooth, WiFi), open-source code/hardware (auditable), user-controlled entropy. Supply-chain risk is low with generic parts; always use Pi Zero v1.3 (no wireless radios).
Use physical dice rolls (highest sovereignty) or camera noise. Verify BIP-39 checksum manually. Dice rolls take time—don’t rush, as errors can lead to invalid seeds.
Prepare PSBT in wallet software, scan QR to SeedSigner, review/approve on screen, scan signed QR back. If QR won’t scan, adjust brightness/density, clean camera lens, or try different distance.
Yes, generates XPUBs for 2-of-3/3-of-5 in Sparrow/Caravan. Test small amounts first; mismatches in wallet configs are a common issue—double-check derivation paths.
Any with QR/PSBT support: Sparrow, Electrum, Specter Desktop, BlueWallet, Nunchuk. QR density/brightness issues can occur—adjust in wallet settings if scanning fails.
Download latest .img from GitHub, flash to microSD using Raspberry Pi Imager or Etcher. Verify hash. Boot failures often come from bad flashes—re-flash and check power supply.
Official tutorials/documentation at seedsigner.com. Community help on Telegram group, GitHub issues, @SeedSigner on X. NovaSapien’s online self-custody courses provide step-by-step guidance, especially useful for beginners—take your time to fully understand before proceeding.
| Weight | 100 g |
|---|---|
| Dimensions | 4.5 × 2.5 × 1.8 in |
| Add-on | Preassembled, DYI |
| Color | Vulcan21 Silver/silver, Vulcan21 Orange/silver, Vulcan21 Black/silver, NovaSapien Black/silver, NovaSapien Orange/silver |
| Weight | ~0.20 kg |
| Dimensions | ~190 × 120 × 50 mm |
| Warranty | 360 days on components |
Take the first step toward unlocking your true potential. Whether you’re looking to build your skills, enhance your knowledge, or create a secure future, this is your opportunity to start making a lasting impact today.
Recommended pairing
Your SeedSigner keeps your keys offline. The NovaSapienBTC Self-Custody Kit gives you everything around it: quality materials chosen for best practice, so you can set up with confidence knowing every detail has been considered.
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