The IP (International Protection) code is a 2-digit rating system.
The first digit (from 1 to 6) indicates the level of protection against contact and penetration by solid particles. The second digit (from 1 to 8) indicates the level of protection against water penetration.
IP 67: complete protection against dust. Protection against temporary immersion in water up to 1 m.
IP 68: protection against prolonged immersion in water (swimming pools, outdoors, bathrooms, etc.)