The bosch gml soundboxx professional radio gives you top sound on site with the added usefulness of the bosch l boxx transport system it provides powerful sounds in many formats including fmam radio and mp3 file it fits perfectly into half a bosch l boxx for easy transport and storage power to the unit can be supplied with either a bosch 144v or 18v lithium ion batteries or by using the mains adapter that is supplied you can connect external players via the aux in port and it comes with 10