IP stands for International Protection or Ingress Protection, and it’s an international standard followed by manufacturers. An IP rating starts with ‘IP’, and is followed by two numbers.
The first number of an IP rating shows how resistant the device is to solids, such as dust. The number ranges from 0 to 6 - the higher the number, the better the protection. A device with a 6 as the first number is completely protected against contact with dust.
The second number refers to freshwater resistance, with numbers that range from 0-9. The higher the number, the better the level of water protection.