Born from the depths of the sea, the Barnacle is a premiere waterproof Bluetooth speaker. It's built to accompany the adventurer and withstand the elements. In addition to its shock-resistant build, the Barnacle is fully dust/sand proof. Dunk this speaker under a wave, toss it in the sand, or float it down the river- The Barnacle can hang. It's a great speaker for working in the garage and in the trailer. Easy to use--turn the Barnacle on, activate the Bluetooth feature on your phone, sync the two, and start listening to music. Built-in microphone for taking hands-free calls. Lasts up to five hours once fully charged. Includes micro USB cable for charging. Not intended for long term use underwater.