it can do 4s. on the lowest kv motor. I think its 3150kv in a 3660 size if I'm not wrong. Its basically a new Max10 SCT.
8BL150 would handle 4s better.
Is this the 6s version of the infraction
Or is this the 3s or brushed version and you want to run on 4s?
If the second one, gotta have a motor that can handle 4s too.
Hobbywing 10BL120 G2 can handle 4s on the lowest kv motor. (Sensorless)
Max10G2 140A can handle 4s
Castle Copperhead 10
Spektrum...