EFI460 Years in the past various engineers and ‘backyarders�?were being operating hydrogen cars on distilled… Any dust, Dust or prints on the surface is usually scrubbed off with a damp cloth, and in some cases the uncovered USB-C and 3.5mm input port elements are waterproofed. That USB-C port is https://www.bluetoothspeaker.top/party-microphone-speakers-powerful-wireless-karaoke-with-bluetooth-speaker/