The IP65 certification is a measure of the resistance to water and dust of electronic devices. IP stands for “Ingress Protection” in English and refers to the international standard “IEC 60529”. The first number informs about the protection it has against dust and the second number corresponds to the protection against water.
As for the IP65 certification, the mobile device is fully protected against dust and is capable of withstanding low-pressure water jets, such as a shower.