There are 4 limits that can be established for the codes you create:
The "usage" option limits how many users can have Internet access using the same code.
The "Expire Time" option limits how the user(s) will have Internet access using a code.
Different codes can have different time limit.
"Down Speed" and "Up Speed" options, guests using this code will be throttled (limited) to the speeds selected. Default set on bandwidth control page.
You can limit the data Download and Upload. Guests sharing codes will also share the limit. Default set on bandwidth control page.