- Mobile loudspeaker for perfect music enjoyment with the smartphone, tablet and MP3 player - anywhere and at any time ,- Battery-operated for complete mobility: the battery can be charged using a USB cable ,- Fast charging within 4 hours ,- LED indicator shows if power supply is active ,- Small and compact - suitable for every bag, can be taken anywhere ,- High-quality and robust aluminium housing ,- With anti-slip rubber ring ,- Stepless volume control