NOTE: 1.Waterproof test is required before applying the product:Put some paper inside the waterproof case, then put the waterproof case bag into water, check if the paper get wet after 30 minutes.2.Before applying the product, please make sure all zippers have been completely sealed and the magic tape have been fasten well.3.This product is not suitable for diving; Please avoid long time immersion in water. Water tight bags allow you to use your electronic product without opening the bag and can clearly see inside.