Underneath the waterproof flap are all of the inputs and outputs that you’ll need for charging and connecting towards the speaker. Any mud, dust or prints within the pores and skin can be scrubbed off with a moist cloth, and also the uncovered USB-C and three.5mm enter port things https://www.bluetoothspeaker.top/retro-sound-phonograph-record-player-bluetooth-speaker-radio-music-mp3-player/