Does anyone know what is the plugin of this phone button effect or what is its CSS code

<div class="ripple">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
  <path d="M2 3a1 1 0 011-1h2.153a1 1 0 01.986.836l.74 4.435a1 1 0 01-.54 1.06l-1.548.773a11.037 11.037 0 006.105 6.105l.774-1.548a1 1 0 011.059-.54l4.435.74a1 1 0 01.836.986V17a1 1 0 01-1 1h-2C7.82 18 2 12.18 2 5V3z" />
</svg>
</div>

.ripple {
   display: block;
   width:30px;
   height:30px;
   padding: 1rem;
   border: 2px red solid;
   border-radius: 50%;
   transform: scale(-1,1);
   color:#fff;
   background-color:red;
   animation: pulse 2s infinite
}

@-webkit-keyframes pulse {
  0% {
    -webkit-box-shadow: 0 0 0 0 rgba(255,0,0, 0.4);
  }
  70% {
      -webkit-box-shadow: 0 0 0 10px rgba(255,0,0, 0);
  }
  100% {
      -webkit-box-shadow: 0 0 0 0 rgba(255,0,0, 0);
  }
}