Ledger is a hardware security solution for cryptocurrencies. Ledger project is a hardware cryptocurrency wallet. The company offers two hardware wallets: Ledger Nano S and Ledger Blue. Nano S comes in USB format, so users can carry it everywhere. Meanwhile, Ledger Blue has a touchscreen and can be connected via USB or Bluetooth to smartphone or computer.
Both wallets support a large number of cryptocurrencies and run on the company's own interfaces – Ledger Apps (free Google Chrome apps).
The solutions work on Windows, Mac, and Linux.