The UE Wonderboom 2 and also the UE Boom three are quite portable and durable. The Wonderboom is slightly a lot more portable than the other two, weighing in at 15 ounces and boasting IPX7 waterproofness. Its small and stout shape also aids it vanish inside of a backpack. https://www.bluetoothspeaker.top/new-speaker-box-hifi-subwoofer-outdoor-waterproof-wireless-bluetooth-speakers/