The speaker also doubles like a power bank with its USB-A port, enabling you to charge your devices on the move. The JBL Portable application offers additional features like PartyBoost for connecting multiple speakers and a simple equalizer for sound customization. Plus, it offers an IP67 rating for dust https://www.bluetoothspeaker.top/bt-speaker-usb-rechargeable-speakers-support-aux-tf-subwoofer-loudspeaker/