This is a Popup Scubscription Form.
View Details : http://mycodingtricks.com/html5/stylish-newsletter-email-signup-form-with-css-and-jquery/
#Features of Popup Opt-in Form:
Below is list of features of the MCT Popup Opt-in Form:
#1. Stylish and Easy to Use
#2. Mobile Responsive
#3. Automatically Center Itself on Screen
#4. Automatically fit itself on Screen
#5. Supports Any Device
Hide extra text on Smartphones while user is typing. #6. Exit-Intent Technology
#7. Slide-in Scroll Trigger Box