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