The most reasonable thing for today's era, the brand, the origin made in Taiwan, and its price. I have been using mixers from various companies since 1983 and I recommend this particular one that you will find many positive reviews from foreign sites. I have connected two MK2 turntables and a laptop. The results were satisfactory in a crowded venue with high volume, so don't pay attention to other comments about bad sound. I would like harder potentiometers, the fader is good in this particular matter, and also to be able to see the input signal simultaneously with the output without having to switch. The record output is very helpful because I use it to connect my own powered speakers in addition to the master that plays in the respective store, so we have 2 master outs. The device is connected to the socket with an external power supply. Essentially, it is a mixer to load all our old devices as well as new ones, and also to record in the traditional way we knew from the past. I did not detect any buzzing or anything that sparked curiosity, and the humming was unnoticed even when there was no sound at all. Anyway, if you decide to buy this brand, prefer this particular model because the price difference with the 2 potentiometers is less than €10

I initially bought this mixer for amateur use at home. However, due to my job as a DJ at weddings and other events, I now use it on a permanent professional basis.
The NUMARK M4 is a simple (old school) mixer that not only is worth its money, but also praises the name Numark!!!
Simple, sleek, and straightforward!!!
The sound card is excellent!!!
Functions and responsiveness are excellent!!!
I have been using it non-stop for 4 years...
I gave it 4 stars because it has a MASTER RCA output and not XLR or TRS