Trezor One is a wallet in Hardware format that supports the most popular cryptocurrencies: BTC, BCH, BTG, LTC, DASH, DOGE, ETC, ETH, the ERC20, NEM, NMC, ZEC, EXP, UBQ tokens.
As it is an off-line USB device, the storage security of your coins is much greater and its operation is quite simple. You can receive and send coins, for this you have to connect Trezor to your computer with the program available for Windows, Mac and Linux.
It also supports various wallets, for which you do not need any private key to access the balances and make transactions: Arcbit, Electrum, Electrum Dash and ltc, Etherwall, and Mycelium between others