ShopApplies to: COLDCARD Q, Mk5, and Mk4
Verified on: July 17, 2026
Choose your model before following a menu path or loading firmware. Q and Mk-series devices share many concepts, but their controls, screens, power options, and firmware files are not interchangeable in every case.
COLDCARD Q
Read about Q controls, status indicators, power, dual MicroSD slots, QR, NFC, and USB settings.
COLDCARD Mk5
Review the current Mk5 overview, hardware changes, controls, and supported workflows.
COLDCARD Mk4
Review Mk4 hardware, connections, secure elements, NFC, and MicroSD operation.
Dimensions and connectors
Compare current and legacy model size, weight, power, and connector information.
For firmware, start at COLDCARD Downloads and confirm the model named by the file before installing it.