Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the accuracy of the data collected and presented through the fitbit service is not intended to match that of medical devices or scientific measurement devices . 

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