nickel works in 1/2-out

This product does what we ask. I use it like this (with 1 input and 2 outputs):
- Optical digital TV output -> D / A converter (cinch) -> OUT jacks on the KALEA
- Of the KALEA cinchs IN 1 -> Wireless Headphones
- Cinchs IN 2 of the KALEA -> hi-fi

We can therefore use it in 2 inputs and 1 output or I in 1 input and 2 outputs

I tested carefree, to see the long term.
The function buttons are a little "vintage" but it works very well