This soundbar is really usefull and functional when you would turn up the volume of your phone without any electronic device.
It can be printed well without support but I advise to use colling fan and PLA, I tried with ABS (couse i didn't have PLA) and I still got good result but i found out some problems with adhesion to the plate; how ever it works!
The dimensions of the hole for the phone are 12x80 mm so it should be suitable for most smartphones, otherwise you could just scale it!
ENJOY IT!