It's measured within the IP scale, which has numbers that refer to the defense your device has against solids and liquids. The 1st digit just after IP suggests stable safety while the second a single pertains towards the liquids. Pyle Portable Bluetooth PA Speaker System is actually a superb https://www.bluetoothspeaker.top/waterproof-bluetooth-speaker-handsfree-noise-reduction-dustproof-bluetooth-speakers/