Rolls Bellari VP549 Phono Preamplifier

hi everybody this is a quick look at the bolari vp549 phono preamp um it's in a cool red finish goes for 149.99 and all that's really included in the box is a manual the preamp and the power adapter right here it's actually like a generic switching power supply but it's pretty decent quality i noticed really no noise generated from it so at least it's a decent quality just to go over the features of the preamp it's got a cartridge load capacitance and you can set this to three options basically just match the spec of your cartridge and or just do the one that sounds best for you i'm using the grado uh black prestige black so on the manual that states that it's unaffected by the capacitance so i usually just left it at 120. the rumble filter on or off and it's got a gain knob which is i guess kind of helpful but you know mainly we just use the master volume knob but what this is actually