i>
                </button>
                <button type="button" class="btn btn-default btn-sm" data-widget="remove"><i class="fa fa-times"></i>
                </button>
              </div>
            </div>
            <!-- /.box-header -->
            <div class="box-body">
              <div class="row">
                <div class="col-xs-6 col-md-3 text-center">
                  <input type="text" class="knob" value="30" data-width="90" data-height="90" data-fgColor="#3c8dbc" data-readonly="true">