First at all, let\'s explain what trezor is. Trezor is offline Bitcoin wallet, which are holding your private key and know how to sign a transaction without the connection to the internet. It is pretty small device that works offline but it giving you ability to spend you coins anywhere. You are accessing to your wallet, connecting it with some device for example laptop or PC through the USB connection. The only thing you need to do when you are installing Trezor is to install a bridge, which is allowing the Trezor to communicate with the computer and follow your instructions. Choosing a PIN code is pretty difficult, because all of your asset is stored behind that password and you surely don\'t let someone to get you cryptocurrencies. The PIN code will be needed every time when you are connecting device with the computer. Besides password there is also so called master private key - your recovery seed. The device will show list of 12 words which you will need to write down and keep in a self place.
After setting your password and your master private key you are ready to connect trezor to any computer, access the client for the Bitcoin Trezor, and send Bitcoin to whoever you like. Many people are wondering if Trezor can be hacked. There is no username or password for your account, your credentials are your device. Literally if someone physically doesn\'t steal your device, there is no chance for someone to get your assets. Even, there is one situation called Evil Maid, and this is a situation when attack is made physically on a computer that is left unattended. So, attacker have ability to physically access the computer multiple times without the owner\'s knowledge. Basically, nothing is 100% safe, same with the Trezor.