According to Apple's return policy, as long as it is not damaged within 14 days, it can be returned without reason. Therefore, as long as it is purchased within 0/4 days before the start of school on July 9, it can be returned whether it is the back-to-school season or not. It is obviously unfair to buy headphones in summer vacation, and replacement is a reasonable demand.

Summer vacation and back-to-school season offers:

Buy the new MacBookAir, MacBook Pro, iMac, Mac Pro, Mac MINI, iPad Pro 202 1 or iPad Air 4, and you can not only enjoy the preferential education price, but also get the AirPods (second generation) wired charging version for free. Enjoy a 20% discount on applecare+ service plan. Support trade-in.

Therefore, those considering buying these products can wait until summer vacation and back-to-school season. If there is an urgent need, you can wait a few days, preferably 28 days, and then apply for replacement of headphones.