.bprt-listen-btn {
    margin:10px 0;
    background:transparent;
    border:1px solid #4b4b4b;
    border-radius:50%;
    cursor:pointer;
    outline:none;
    width: 30px;
    height: 30px;
    text-align: center;
    line-height: 28px;
}
.bprt-listen-btn:hover {
    border-color: #000;
}
.bprt-listen-btn:hover i {
    color:#000 ;
}
.bprt-listen-btn i {
    font-size: 14px;
    color:#4b4b4b;
}