Small headphone amp 150 x 75 x 38 mm, 590 gr lightweight, comes with its small 12V

A one line to the four headphone outputs jacks while stro 6.35
4 potentiomres rgler volumes for each headphone individually.
Impdance 51 ohms per channel.

Small, friendly and not too onreux 60 euros, almost a good price for my mixer
but makes good service even when!