Adjustable CCCV Step UP Down Voltage Converter DC-DC 5V 12V 24V Automatic Buck Boost Power Supply Module Solar Charging

good morning all today i have this it is a very nice looking buck boost converter so i'm going to put it through its cases try it out see what it does see what it does badly see what it does well so there it is it's a dc or it's a bag of bits there we'll have a look at that in a moment it's a dc to dc converter uh oh this is the one without the fan but clearly it can have a fan that's interesting i thought i bought the more expensive one obviously not uh v in plus v and minus v out now the cc and cv on this are 10 turn potentiometers but they have these little knobs on them so this is essentially a manually controlled current and voltage unit but it also has a sort of minimal digital interface there's a set button there's a big display i don't quite know what probably lcd and there's an on off button so you can control the output enable it and disable it uh can you also perhaps set over