I already had the opportunity to test the range of JBL FLIP and frankly, it's really worth. Small and compact, but delivering a sound output of 85 dB, they really used to listen to music easily and most importantly, EVERYWHERE! Evenings campaigns or even to pose with his friends somewhere in town where there is no outlet, they are really great. Sound is good enough, the bass is good, almost made headphones :) The only flaw is, although I have not looked in reality, there is no means for an amp, that is, to adjust the EQ (or EQ / tone correction) even If the settings can be done from the mobile. Bluetooth technology works extremely well, a reasonable range; ie that one can do without the mobile device without stopping the music of the enclosure. The battery holds relatively well, at least 3-4 hours. Obviously, the higher the volume, the more battery power is used;)
A very good investment already profitable (evening this saves on pregnant platinum + rent). It's really a smart purchase :)