Both speakers are IP68 waterproof and mud-evidence and are equipped with newly formulated woofers that help increase bass effectiveness along with the requisite reference to AI that almost each and every new product appears to be to incorporate today. An optional spare battery extends its roughly twelve-hour play time. https://www.bluetoothspeaker.top/new-design-bluetooth-speaker-super-bass-wireless-bluetooth-speaker-support-tf-card-with-oem-odm/