need to change battery, every 1-2 month
thick lithium coin battery not commonly available to buy out side
the only indicator whether the battery run out juice is that there is no led light flashing from time to time.

it is just bluetooth, the limitation of bluetooth. just.... ahem...
it is just a portable small device. ahem...

This post has been edited by stupiak07: Nov 3 2021, 02:59 AM