There is no wai to know how mutch left battery you have, there is no indexing for the play button(i always need to feel the three buttons before i push the desired one) and witch side is to open the charging port(one month using it and it is hard to remenber witch side is the rigth one), the low battery message is annoyng and late(around 10 minutes before the battery dies it play a low battery message with one minute interval until it turn off), has its own internal volume settings(volume up and down does not change the cellphone volume setting)