A：The manufacturer offers (a one-year warranty on any factory defects / an unlimited 90-day warranty).
      生产厂家提供（1年的厂家责任保证/无限制90天保证）。

B：Great.
      太好了。

A：What sort of warranty (comes with / is there on/ do you offer on) this stereo?
      这种音响（附带/包括/你们提供）何种保证？

B：We offer a 90-day return policy.
      我们提供90天的退货保证。

B：Can I help you, sir?
      有什么可以为您效劳的，先生？

A：Yes, what sort of warranty comes with this stereo?
      好的，这种音响有哪种质量保证？

B：Well, our store offers a 90-Day return policy and the manufacturer offers a one-year warranty on any factory defects.
      哦，我们商店提供90天的退货保证。生产商则会提供为期1年的质量保证，如果是生产厂家造成的责任的话。

warranty

A：What conditions are there on the store policy?
      退货保证有何具体条款？

B：We’ll give you your money back as long as the stereo is returned in the original packaging and with a receipt.
      如果有收据，而且音响以初始包装退还的话，我们会将您的钱给与退还。

A：O.K. How do I get the manufacturer’s warranty?
      好的，那么如何得到生产厂家的质量保证呢？

B：Just send in the warranty card with a copy of your receipt.
      只要把质量保证卡和收据的复印件寄过去就好了。

warranty的解释

A：All right, those sound good. I’ll take it.
      好的，很不错。我买下了。

B：Very well, I can ring you up over here, sir.
      很好，先生，请在这儿付款。

1. 保修单
    A warranty is a written promise by a company that, if you find a fault in something they have sold you within a certain time, they will repair it or replace it free of charge.

warranty在线翻译

    e.g. ...a twelve month warranty...
           为期12个月的保修单
    e.g. The equipment is still under warranty.
           这套设备仍在保修期内。