You can add any HTML here (admin -> Theme Options -> Promo Popup).
We suggest you create a static block and put it here using shortcode

Sign up and get $5.00 off today's purchase!

Join our mailing list to receive the latest news and updates and get $5.00 off any purchase made today!

Thank you! Please use coupon code "Order5" on checkout to get your $5.00 off!