The Bat Signal is a distress signal device that has appeared in DC Comics Batman comic books some eight decades ago. Its longevity is evident since it remains the most iconic image associated with Batman. It has been redesign numerous times throughout the years, along with many different Batman story lines.

As Batman fans know it is a means to summon the superhero, Batman.

The Batman Bat Wings logo is a different take on the standard Batman logo design by incorporating gargoyle like wings to the sides and stylized flames above the bat logo giving it a more colorful and decorative look.

Read about the Bat Signal from this Wikipedia page.

Here is another interesting post titled Batman Logo and Its History