In my opinion, the best portable speakers in this price range. The sound is extremely good for the size and surprised me. The box does not have a separate volume control. The maximum volume is therefore dependent on the connected device. With an iPhone4 and iPhone5 the volume is good and sufficient but on the go, but you should never set the maximum volume on the device, otherwise the box begins to scratch. In addition: the speakers are extremely robust and have with me, among other things for two months already backpacking in Thailand and Cambodia endured (water, sand, sun, scatterbrained people :))
