Final answer:
Without specific context, it is not possible to determine the service fee for premium audio headsets. The correct answer would depend on the provider or retailer's pricing, any ongoing promotions, or additional service details.
Step-by-step explanation:
The question regarding the service fee for premium audio headsets does not provide sufficient information to determine the correct answer.
Normally, a service fee or price for a product such as premium audio headsets would be set by a company or specified in the details of an offer or promotion.
If you are looking for the service fee for premium audio headsets in a specific context, such as a subscription service, an online platform, or a retailer's extended warranty service, it would be best to check the official sources or documentation provided by that service or retailer.
It could be a fixed price, part of a promotional deal, or subject to change based on various factors such as model, brand, or additional features.