It's measured on the IP scale, which has numbers that confer with the security your unit has in opposition to solids and liquids. The first digit following IP signifies good protection while the second 1 pertains into the liquids. Why doesn’t a rolling wheel keep accelerating if friction torque https://www.bluetoothspeaker.top/flashlight-function-bt-speakers-outdoor-wireless-audio-waterproof-bluetooth-speaker/