Anyone serious about records and record collecting needs the following preamplification features:
1) mono switch.
2) balance control.
3) subsonic filter.
Also helpful, is the ability to switch to left or right channel exclusively, although that is not as important as the others cited above.
Unfortunately, many preamps are not equipped with these features. It may be due to cost, and it might be due to the prevalence of digital sources, which make them superfluous, or if you need them, they can be done in software. In the days of analog, almost every preamplifier had them. If I was looking in the one hundred and fifty dollar range, this little box would be on my short list.