From Dashboard you can create your own coupon templates.
How to create coupon template
STEP 1
Log in on http://dashboard.tanaza.com
STEP 2
Click on "Configure Template" from Drop-Down Coupons Menu and then click on Configure

STEP 3
Configure your coupon by selecting preferred fields and clicking on Save button when done.

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Duration: this value specifies how long user can use the wifi during one connection.
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Stop and resume: if enabled the counter will stop to go ahead if user doesn't use the wifi and it will restart again at the new access (minimum is 1 hour, e.g. if the user will use the connection for 30 minutes, the counter will consider consumed 1 hour).
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Max Activable Devices: number of devices that user can connect
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Valid For: coupon's validity
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Download/Upload quota: amount of data that user can download/upload
Also accessing to "Print Preview" tab, you can add a text for your customization and see in preview mode your coupon

Related Article
Wi-Fi Couponing System: overview