IP68 is a protection rating against dust and water, and it is an international standard that shows the level of dust and water resistance of a device. The "IP" stands for Ingress Protection, and the first number refers to protection against solids, while the second number refers to protection against water. An IP68 rating means that a device is completely dust-tight and can withstand temporary submersion in water up to 1.5 meters deep for 30 minutes. It is important to note that even if a device has a high IP rating, it may not be completely waterproof, and any drops or damage can make the IP rating void.