The answer
Some devices show limited or opaque signing data; that increases the risk of unknowingly authorising a malicious action.
What to do next
Use clear-signing support where available; otherwise independently inspect the contract and decline unexplained approvals.
Trezor hardware wallets
Potential cold-storage product; not a substitute for safe backup procedures. Availability, supported assets and local eligibility must be checked before signing up or buying.
Visit Trezor hardware wallets ↗Official provider link · Compare suitability and availability before choosing.