How to get checkbox values in ngFor ? In Angular 2+?

Hy, I need collect selected values through checkbox check's which are in ngFor. Below is the code.

 <tr *ngFor="let item of items; let index = index;">
    <td></td>
    <td></td>
    <td></td>
    <td>
      <input type="checkbox"
             name="domain-"
             [(ngModel)]="items[index].id"
      >
    </td>
  </tr>
<button (click)="OnSelect()">Select</button>

In component, Im trying to access like this.

component.ts
items = [];
ngOnInIt() {
  this.items = somepromise.then((items) => this.items );
}
OnSelect() {
  console.log(this.items);
}

On Select, I see all values of items printed instead of selected check box values. Any thoughts ?