You can install and configure the plugin is very easy.
After installation, you should open the plugin Configure page and configure it. You can display the timer at any places.
Your timer will be displayed on the page will look like the following.
If you want to display the timer on product box the timer will look like
When can you set special price? For old nop versions plugin uses internal special price values from product's settings.
When can you set special price? For new nop versions plugin uses tier price with qtn =1.