Hello Acid-int The IP67 certification defines on the one hand that the device is dustproof and on the other hand that it is protected against temporary immersion in water up to a maximum depth of 1 metre for a maximum of 30 minutes. Of course, this refers to clear water; the protection does not apply to other liquids, e.g. salt water, soapy water, alcohol or heated liquids. In addition, it must be ensured that all covers of the unit are always completely closed so that no water can penetrate.