CardSigner Premium
A CNC-machined aluminium bitcoin signer with a smartcard slot. Pre-order, ships in December 2026.
Pre-order. Ships in December 2026.
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About this product
CNC-machined aluminium, sandblasted and anodized black. Every edge chamfered. Silver buttons. Designed and manufactured in Belgium.
A hardware wallet keeps your seed inside. CardSigner Premium saves it to a card and then forgets it. Create your seed on CardSigner Premium and save it to a PIN-locked Satochip SeedKeeper card. Unplug it: the seed is gone from the device, and the card keeps it.
Sign by QR code: your wallet shows the transaction, and CardSigner Premium scans it and signs it.
- Runs the SeedSigner smartcard fork: open source, community-made software
- Bitcoin only. No account.
- 2.8 inch IPS screen, 320×240, camera for QR codes
- Smartcard slot for SeedKeeper cards
- No Wi-Fi, no Bluetooth, USB-C power
One black metal SeedKeeper card is included. Extra cards are EUR 35 each, up to five cards in total.
Pre-order: you pay in full now, and we ship in December 2026.
Download and verify the software yourself at verify.bitsaga.be.