Optrel Crystal 2.0 batteries

When i got my optrel i chucked the instructions away with the packaging as i was never going to need them

Today i noticed a green led flashing and the mask seemed to pulse from light to dark, then stayed light.

Would this be the batteries gone flat?

 

https://www.optrel.com/en/service/kundenservice/downloads/?no_cache=1

The manual is just a little way down.

Hopefully hepful

 

Thanks for that. I couldn't find anything earlier.

Looks like the batteries need changing.

 

It was the batteries. All working ok now.