MicroBT is the manufacturer.
They say that the M10S can do 55 Th/s hash rate with 65 W per Th/s power efficiency
or 44 Th/s hash rate with 60 W per Th/s power efficiency.
So I suppose there are two different modes you can choose.
thanks for the clarification, so it would be a potential firmware modification or something. I was getting ready to order one since I'm not feeling the Antminer s15.