The IP Code quantifies various levels of resistance to liquids and particulates rather than a vague description such as "waterproof" or "dustproof”. The numbers following the letters "IP" represent the degree of protection provided by the enclosure. The first digit indicates the ingress of dust at a level that will not have a harmful effect on the operation of the unit. The second digit indicates that water sprayed from all directions will not compromise the performance of the components. Higher numbers indicate a higher tolerance to dust and water.