DelegateManager is an online web application, so it will not work without a stable internet connection.
However we have developed an App on both Apple App Store and Google Play that handles delegate Check-In - which supports offline modes. So if you don't have internet connection, you can still check delegates in.
Note: You will require a stable internet connection to initial connect the Check-In app prior to registration and again to sync back to the system, but once the information is on the app, the process itself can be completed without connection.
Tip: Wait until the night before / morning of your event to connect your app to DelegateManager to make sure you have all the last minute registrations.