Three cell phone features are very simple, that is, dustproof, shockproof, waterproof function of the mobile phone, mainly for young people who love outdoor sports or have special needs of professional users. With its professional waterproof, dustproof and excellent anti fall, anti rolling performance, it can be used in extremely bad weather conditions and special occasions.
Based on the national three defense technical standards, combined with the actual needs of the market and customers, the three grade is defined as the three level standards, that is, junior, intermediate and advanced (professional level). The three level is defined as follows:
Junior: IP56 - class 5 dust rating, class 6 waterproof grade, 1.5M drop, regular vibration.
Intermediate: IP57 - 5 class dust rating, 7 class waterproof grade, 3M drop, regular vibration.
Senior: IP68 - class 6 dust rating, class 8 waterproof grade, 5M drop, regular vibration.
The protection grade adopts the IP * * grade standard recommended by the International Electrotechnical Commission (IEC), and the grades are different for different installations. Specific can refer to the following description selected. In the grade standard, "X" is the two digit number, the first represents the protection level of the solid, and the second represents the protection level of the liquid. There are 7 grades of solid protection, which are represented by 0-6. There are 9 grades of liquid protection, which are expressed in 0-8.
6: completely prevent dust entering