The Aqua Sound WSP40 Bluetooth speaker comes with a built
in rechargeable battery. Before using it for the first time we
recommend you charge the battery fully.
1.Connect the USB cable to the USB port on the unit.
2.Connect the other end of the USB cable to a USB port on a PC
or an AC/DC adapter. The LED indicator turns on to indicate that
the battery is being charged. When the battery is fully charged,
the LED indicator will turn off