This article explains how to add additional devices to EloView 3 subscription

Adding additional devices to your EloView subscription is easy. 

You can purchase additional device licenses directly from within your EloView account by following the steps below:

1.  Login to the EloView website - https://manage.eloview.com
   
   
2. Click on Accounts-Account Settings in the upper right corner and choose Payment.
   
   
3. On the bottom left-hand side of the “Subscription Status” page, click Update Plan.
   
   
4. You can now select the how many licenses you need of each mode type. 
5. Once complete, you can then go into each device already in your account and select the appropriate mode to align with your purchase.