A cold wallet is a hardware where you can store digital coins out of the network, so these wallets are very safe, since you do not need to be exposed to some kind of hacking, it is also immune to any computer viruses that try to steal wallet. The password is stored in a microcontroller and can not be transferred.
These are some of the cool wallets we can find:
"TREZOR"
This portfolio was created by the company SatoshisLabs, allows safe storage outside the network.
It consists of two buttons where one is used to confirm and the other to deny the transaction.
It allows to save 5 types of coins: Bitcoin, Ethereum, Litecoin, Dash and Zcash
"Keep Key"
This portfolio allows us to connect from a USB from the pc to be able to perform the transaction, generate random addresses and can only be used once, the truth is that it is highly recommended.
It allows to store: bitcoin, such as Testnet, Litecoin, Namecoin, Dogecoin and Dash.
"Case"
It is from the company CryptoLabs its creator was Bense Samue, to be able to make a transaction asks us 2 or 3 keys for confirmation is very safe and some of the best.
We can only store Bitcoin.
"LEDGER WALLET"
Ledger Wallet offers three types of wallets: Ledger Nano, Ledger HW.1 and Ledger Unpugged in which we connect in the computer to be able to make transactions.
It allows us to store Bitcoin.
HOPE YOU LIKE!!