Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
fitbit 's terms of sale and returns and warranty policy apply to purchases made from fitbit . 

```
. OPTIONS: ['Unilateral change' 'Content removal' 'Jurisdiction' 'None'
 'Limitation of liability' 'Arbitration' 'Unilateral termination'
 'Contract by using' 'Choice of law'].