Opendime is a small USB stick that allows you to spend bitcoin. It connects to any USB so you can check your balance.
Prokey hardware wallet is an offline, cold-storage, and secure device that keeps your private key offline and protected, enabling you to receive, store, and sign transactions to send digital assets like bitcoin, Ethereum, Litecoin, Tether, and more.
Secalot is a hardware cryptocurrency wallet. It’s a small USB dongle that features OpenPGP smart card, U2F authenticator and a one-time password generator.
SecuX technology provides military-grade Infineon SLE Solid Flash CC EAL 5+ Secure Element. Its cross-platform operation includes SecuX web and mobile apps for 1,000+ digital assets for up to 500 accounts.
Trezor is the world’s first bitcoin hardware wallet. The Trezor One and Trezor Model T cold wallets each support more than 1,000 coins, have an easy-to-use LED interface that’s compatible with Windows, Mac, and Linux, and have several security features, including PIN entry, passphrase entry and device recovery.