Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may only connect to the fitbit service using ( i ) a device that is manufactured , distributed , or sold by fitbit itself or through its authorized resellers or agents ; ( ii ) our mobile applications and software , or approved third-party applications , software , or devices ; or ( iii ) our websites ( `` authorized connections '' ) . 

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