How about the service of just4ear company?
The service of Just4ear company is very good. Judging from the relevant public information, as far as the product itself is concerned, JustEar is not an earplug that only focuses on wearing comfort, but an earplug product that wants to customize the sound for customers. This is also the most basic concept of JustEar. Its service attitude and concept are the same, and it is customer-oriented.