How to add icon on border of box

<div class="col-sm-4">
      <div class="div1">
        <br>
        
<h3 style="color: red;font-weight: bold"> Qualified Coaches </h3><br>
<p style="text-align: center;">  Our coaches have years of experience  in<br> various types of fitness and sports. </p>

      </div>
    </div>
</div>

.div1 {
    width: 350px;
    height: 160px;
    border: 2px solid grey;
    opacity: 0.9;
}