Log into the Mono dashboard. On the sidebar menu, click the "More" dropdown tab and click "Settings" or search for "Settings" in the search bar.

Next, Click the "Preferences" button under the "Business" section.

This will show you a list of notifications Mono currently provides. Navigate to ''Wallet threshold'' and click on the "Manage" button.

This shows you a popup that allows you to enter the figure at which you'd like to be notified, and the option to toggle the threshold notification off and on at the top right.

Once you have entered the figure, click "Set threshold" and Mono will now send you a wallet balance notification via email once your balance goes below the value set.