All credit card terminals and PIN Pads should be injected with your processor's encryption key. If you plan on sending this device to your processor or an ESO to have the encryption key injected, or all your card sales are MOTO (hand keyed) transactions, choose the "None" option. If you select the "Add Encryption Key Injection" option, you will be contacted within 24 hours via email regarding which encryption key your card processing company requires. Key injection will add 1 to 4 days processing time to your order. Click to learn more about encryption key injection.