The primary function of Trezor is to serve as a hardware wallet for cryptocurrencies. In addition to its primary function, it has many other security applications, such as password management and second-factor authentication.
The first generation of Trezor, first released on 29 January 2014, is currently known as Trezor One. The next-generation device is called Trezor Model T and was released on 26 February 2018.