E. The use of a case or Bumper that is made out of rubber or plastic may improve wireless performance by keeping your hand from directly covering these areas.
使用官方的Bumper或其他橡胶或塑料保护套可能提高无线性能，因为保护套避免用户直接覆盖这些区域。
2
Apple apologists have dismissed these issues as "no big deal," given that a rubbercase effectively solves the problem.
苹果称这些问题“没什么大不了”，一个橡胶套就可以解决问题。
3
They come with a clothes clip (reduces cable strain so they won't yank out), a carrying case and comfortable rubber-dome earbud tips in several sizes.