Matt Murdock will know if you are wearing the 1.25 inch diameter Daredevil Face Button. This is because the Daredevil Face Button has been crafted with a special blend of acoustic metals which reflect and project Daredevil's unique extra sensory echo-location type skill! Okay, I'm not really sure if the Daredevil Face Button is made with some kind of fancy metal, but I'll just assume it does because it works for this description. Swish!