Who sweats: Stay away!

Had acquired equal to 2 times this Bluetooth (Sport) headset.
I could just not test long :(
Have both worn during indoor cycling / Spinning where you sweat heavily because of the missing airstream.

First of all the positive properties:

+ Pairing, Bluetooth connection and LED displays good
+ Sound: for this price range really good
+ Battery life (unfortunately only once tested) also good (about 6 hours)
+ Sitting on the ears, neck and Weight: Very comfortable and non-irritating

Then once the minuses:

- The first headset to check after about 10 hours no longer turn on, switch / button was ineffective.
- The second was already out after 4 hours:
At first all the buttons without function, read no more off, did it once charged fully ,, then no longer turn on.
Downstream of each sports unit.

I guess that both devices "drowned" are.
Since the manufacturer on Amazon advertises it as follows:
-Sweatproof Design ideal for sports and active Nutzung-
is it for me just SCRAP!

Who needs it for listening to music WITHOUT sweating, will have his fun.

Hope I could help, with best regards
ML