The Ledger Nano S makes it easy for people to securely take control of their own money without relying on any third party service to sign transactions. When you use the Ledger Nano S, you have your own Swiss bank account in your pocket.
Background
There's a number of software-based user controlled wallets in Bitcoin. Blockchain.info is probably the most well-known, and there are others like Copay and Airbitz. These are relatively convenient, but have the downside of not giving users full control and being more vulnerable to security breaches.
For Blockchain.info, the keys are stored on Blockchain.info's server, encrypted and the users password decrypts the private key to sign the transactions. For Copay and Airbitz, the keys are stored locally on the device, and are susceptible to device vulnerabilities.
Ledger Nano is a hardware device built solely for storing private keys and signing transactions.
Why would you want to use it?
If you own Bitcoin or Ethereum and want to store it securely without relying on any third-party service, you should check out the Ledger Nano S. It's dead simple for a non-technical user to setup and gives you control of your money that you've never had before.
Just plug the device into your computer, write the seed down and make sure you hang on to it (for wallet recovery in case you lose the device), and create a PIN to access the device. Then when plugged in, you can send BTC and ETC from other wallets to the device to secure them better than ever before!
