.chatFooter .chatFooterWrapper .chatPanel div.chatSoundPanel {
text-shadow: 0px 1px 0 #000;
background-color: transparent;
background-image: url("https://s8.hostingkartinok.com/uploads/images/2017/09/e9819c500aad7d1b004a0d78ea0a3101.gif ");/*Картинку анимации можно свою ставить */
background-position: right 0 bottom 0;
background-repeat: no-repeat;
background-size: 150% auto;

border: 2px solid #fff;
border-radius: 8px;

 box-shadow:1px 1px 6px #000,-1px -1px 1px #fff;
}