Select only one check box

I am using ionic 2 and angular 2 for a small project. and I want the user to be able to only select one checkbox from the ones provided. I added and action listener whenever a checkbox is checked but not sure on what the function should really execute.

    <ion-item *ngFor="let category of categories; let i = index">
      <ion-label [innerHTML]="category.name"></ion-label>
      <ion-checkbox color="royal" checked="category.value" (click)="Selection(i,categories);"></ion-checkbox>
  </ion-item>

I am passing the index of the categories into the function but not sure what else to check for. Any help would be appreciated.