UE BOOM 2 is a compact, durable wireless Bluetooth speaker manufactured by Ultimate Ears, a subsidiary of Logitech, that offers 360-degree soundstage effect.

[1][2][3] The drivers in the UE Boom 2 were completely redesigned and provide 25% increase in loudness at maximum volume.

In addition, Boom 2 won't be affected by water even if the USB charging port or audio inputs are exposed.

[2] The second version of the speaker offers Block Party feature that allows up to three people to connect to it via Bluetooth and send music to shared playlist.

[6] David Carnoy reviewed the UE Boom 2 for CNET, remarking favorably on its design and Bluetooth range.