Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
to enjoy headspace via your smartphone or other device , your device must satisfy certain system requirements . 

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