1. International brand waterproof case, because time has proven the quality, but the price is more expensive;
2. The domestic high-end waterproof case, the rookie company to create a brand, the choice of materials are imported new materials, and the price is more in line with the domestic market.
3. Domestic low-end products, applications and projects that have no demand for waterproof grade and quality. The materials are generally secondary or tertiary materials, which have the advantages of low price.