Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you acknowledge that any third-party services that you use in connection with the fitbit service , such as third party applications accessed on fitbit devices , are not part of the fitbit service and are not controlled by fitbit , and you take sole responsibility and assume all risk arising from your interaction with or use of any third-party services . 

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