This is an analog (8 mono) to ADAT (optical).
I bought this product because I did not have enough inputs on my sound card.
This device allows me to get 4 additional stereo inputs.
The rate échantillionage finish is 44.1 kHz or 48 kHz.
It has a word clock input and output.
The type converter is a delta-sigma 24-bit/96kHz.
The quality of sound output is very good, no noise or parasite.
I use it for 5 years.
I have not tried other products before. I was looking for something compact and affordable.