Ledger Nano is a hardware version wallet designed by Ledger company. Its main advantage is that it allows to store the coins in a USB and therefore, in off-line format.
You can buy the device through its official website for around 94 EUR. It is also available in downloadable format for Windows, Linux and Mac.
To use USB you need a computer with the latest version of Chrome and your computer. No need to install any program or register a wallet account.
Cryptocurrencies Available: BTC, ETH, LTC, DOGE, ZEC, STRAT, XRP, BCH, BTG, ETC, DASH, KMD, ARK, EXP, UBQ, NEO, XST, XLM, HSR, DGB, QTUM, PIVX +80