walkie-talkie, which also called two way radio, is an Two-Way communication tool that could make free calls without any network support, and it is quite applicable to the relatively constant and frequent calling occasions.

In order to protect the Two-Way Radio product from impact of water, dust , dirt and contaminants, R&D of Shanghai PUW EPTFE Material CO., Ltd. has tried their best and developed a product called waterproof acoustic membrane, which could ensure the high acoustically-transparent performance under splash.

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