Instruct: Classify the given Amazon review into its appropriate rating category
Query: Seller does not stand behind guarantee. If you buy, please test voice calls before 30-day Amazon return window closes.

Received defective product, there is static on voice calls. Wrote to seller requesting support through advertised AFTER-SALES GUARANTEE. Never heard back, wish seller stood behind their product and guarantee. As noted by some other reviewers, the wire is a bit flimsy. I've had it a few months and am very gentle with it. It will serve purpose of listening to podcasts in the car, but cannot use it for voice calls. Would not have bought if I knew it wouldn't work as advertised.