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Suitable for swimming, water sports, outdoor activities, etc. It is made of special soft waterproof material and does not affect the operation functions such as answering calls and taking photos. Note: Users should first put dry paper or cloth into the waterproof bag for testing. Place the waterproof bag into the water and shake for at least 3 minutes. After wiping away the water, check whether the drying paper or cloth has become wet before using it. Please wipe off the water after use before opening the bag