The ingress protection scale (IP) is a system that measures the resistance to dust and water for electronic devices like phones and speakers. In a waterproof rating like “IP67”, the first number (6) represents how protected it is from solid objects such as dust while the second digit (7) indicates its level of waterproofing by measuring if it can handle being submerged in liquid at 1 meter deep for up to 30 minutes. We explain more about waterproof ratings below.