@ng2select/combo/select/combo-select.component.css

<!-- Title: ng2select Description: Angular 2 bootstrap select directive module Author: ng2select -->

input[type="text"]{
  color: black;
  border-radius: 4px 0 0 4px;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.42857143;
  height: 34px;
  border: 0;
  /*
  background-color: transparent;
  border-color: transparent;
  */
}

/*
.btn .caret {
    position: absolute;
    top: 50%;
    right: 12px;
    margin-top: -2px;
    vertical-align: middle;
}
*/

.btn{
  border-radius: 0 4px 4px 0;
}

.btn .caret {
    margin-left: 0;
}