It removes parasites after midday, but for the money, it does everything. The issue is that I connect multiple headphones simultaneously, so it covers me completely

It does its job decently!!!
The only problem is that it has a very short power supply cable!!
You need to have an outlet within half a meter.... (that's why the 4 stars).
If you turn it up over 80-85%, it starts to distort... (a little bit but it does!)
I tried it with 3 different pairs of headphones and 2 sets of speakers!
It doesn't have an on/off switch.