Pictures elements card help needed

How can I round the attribute value of dB in 2 decimals ?


and how can I hide attributes when receiver is off ?
I now get an icon instead
like this if unavailable:
image

Possible solutions:

  • set accuracy for this sensor in more-info (if allowed)
  • create a template sensor with required accuracy

Possible solutions

  • use a stock conditional element, see docs for picture-elements
  • use card-mod (display: none) in case of more complex conditions required a use of jinja template

I am not being offended & do not get me wrong - but marking your own post with a picture & w/o any code as a “solution” is not a right behaviour in Community.
Usually people marking as a solution either a post with advices which allows YOU to create a solution - or YOUR own post with a full detailed solution.

Update: no, THIS my post is not a solution at all…