Get value from ion-range

ionic-v1
1

If I have an ion-range implemented like the example on the documentation

<ion-item>
    <ion-range min="-200" max="200" color="secondary">
      <ion-label slot="start">-200</ion-label>
      <ion-label slot="end">200</ion-label>
    </ion-range>
  </ion-item>

How can I acess the current value on the range?