I do not know what to say about this device except that it's a headphone amplifier Octo ...
You can switch to listening to two stereo inputs, switchable to mono on each channel ...
I used it in time to distribute the radio signals to the plays and headphones facilitators on mobile facilities, and send other signals in typical treatments to the needs of radio.
Also served one or two times if the studio still plays for and headphones.
I saw a group of musicians HA8000 use to distribute their in-ear.
I've never had any problems with mine, and I've never heard of this product a little specific, either good or bad.
For me, nothing to report, mine works, no problems.