.multicolumn { overflow: hidden; clear: left; }
.multicolumn li {
    float: left;
    width: 200px;
}

.main.scheda .description ul.caracteristics.multicolumn2 {
    overflow: hidden; clear: left; 
}
       .main.scheda .description ul.caracteristics li
        {
            float: left;
            width: 300px;
        }