coffee grinder has.This is an affordable one click coffee grinder that has multiple coarseness allowing you to have the perfect grind for different drinks.This is small enough you could take this with you, and perfect for an apartment.The batterylife is crazy good on this and gives you a fantastic 48 hour use. I find that this last for MONTHS!This is just as good as my more expensive ones. It is so easy to cleanI love this so much!

This is garbage, don't buy it, It takes 10 minutes to grind a cup of coffee! Each grinding takes only about 30 seconds and sometimes it's 2 minutes. This is absolutely insane.It broke down on the third day of use. I charged it overnight, but the battery failed.

This coffee grinder hopper holds about 1/4 cup of beans at a time. You can adjust the courseness of the grind. I started off at a very fine grind and after 3 minutes it had only ground about an eighth of the beans in the hopper. I adjusted the grind to a courser grind (medium grind) and it still took 3 more 3 minute cycles to grind all the beans in the hopper. I use about a half a cup of beans when I make 12 cups of coffee and it took 15 to 20 minutes to grind all the beans. It did a good job but it took forever.

This grinder works fairly well, especially considering the relatively low price. And, it's really handy to just push a button rather than having to manually turn a handle forever and ever. The grinder does have a ceramic conical burr. In fact, both the burr and the exterior ring are ceramic. The beans are trapped by ceramic parts, so perhaps that helps with the grind. The exterior of the device is all plastic, including the cup for the grinds. That cup is just held on by a friction fit over an O-ring, and that O-ring has a tendency to roll off, which could cause a mess. Charging is via USB-C, but a USB-C to USB-C cable won't work. It requires a USB-A to USB-C.When it comes to grinding, it does a decent job on medium to coarse grinds, the kind I like to use in the French press or Aeropress. Even on medium, there's a lot of inconsistency and some boulders. Worse, it struggles to get the beans to fine. The adjustment mechanism simply pulls the burr closer to the ceramic ring. There are no clicks or stops. Trying to dial in a finer grind results in the burr rubbing against the ring. It seems that the burr is slightly oval and there's quite a bit of flex in the shaft, so the beans aren't being squeezed through a consistently sized gap.

The first thing when I pulled the grinder out of the box, which was wrapped in an unnecessary plastic wrap, was that I unintentionally pressed the power button… and it seems that the button is in a location that I accidentally press often. I don’t know if that is just me or bad design. The grinder came with some charge, and I used the included cord to fully charge it. The indicator light by the USB-C connection is red while charging and green when done. It was charged over an afternoon. An instruction manual is also included, one side in Chinese, and one side in English; the print is small and faint and hard to read. It does indicate the parts and where the beans go. It also explains that a short press of the power button grinds until the coffee beans are all ground, and a long press will grind for three minutes and then stop. The light flashes red when the battery is low. There is no information about cleaning. There is no information about where this is made. On the underside of the bean holder is the dial to adjust the grind. The indicators are arrows toward a smaller dot (finer grind) or a larger dot (coarser grind), and no way to tell how coarse or fine the grind will be—it’s all guesswork and extensive testing. I turned the dial a lot toward finer grind, as finer is my preference, and got an extremely fine grind. I adjusted a few turns toward coarser and saw only a subtle difference. Also, there is a slim silicone ring that fell off, and that apparently was to hold the clear grounds collection piece in place. Since no company information is provided, I have no way to get a replacement and I now have to manually hold it in place or set it on the counter / table. The cylindrical shape is a good design for setting on a level surface while grinding. Because the motor is on top and top-heavy, the surface would need to be level or the unit may tip over. Accordingly, storing the unit upside down would be helpful. For testing, I started with one tablespoon of coffee beans, and the grinder took five minutes to complete. After my grind adjustment, I tested with two tablespoons of beans and the grinder took ten minutes to complete—so allow five minutes per tablespoon of coffee beans. Because the beans bounce a lot while grinding, there are some left when the grinding is done. A nice feature after the grinding finishes is that the grinder pauses and goes the other direction briefly to clear. This has a weaker motor, which accounts for the long grind time, and also means it is not too loud—although it does make some noise. With the long grind time, it is better to put it down than hold it. This can be used for travel if you take extra care to keep the collection piece attached. At home, it is convenient for grinding without having to plug in a larger unit. This can also be used for spices, etc., but again, identifying the coarseness or fineness of the grind is a complication. I love the ceramic grinder, and the battery seems to hold a charge for a long time, but the difficulty of finding your grind coarseness / fineness and the slow speed make this an inconvenient device.

If you want to use this to grind coffee beans, you are wasting your money.

I bought this so I didn't have to plug in my coffee grinder in the morning when I'm using my air fryer so I don't trip the breaker. This serves its purpose and works great, and doesn't make a mess pouring the coffee into my coffee maker.

This M-MAX grinder is basically a large pepper mill for coffee. It uses a ceramic burr and has a twist knob at the bottom to adjust the grind size, just like you’d use for peppercorns. It technically works, but I wouldn’t call it a great coffee grinder, especially if you’re particular about grind consistency.That said, the convenience factor is there. It’s portable, wireless, and super easy to use with one button. I wouldn’t use it as my daily grinder, but I keep it around for travel or when I want to make coffee somewhere that doesn’t have a proper setup.If you’re serious about your coffee, look elsewhere. But if you just want something that can grind beans anywhere in a pinch, it does the job. 3 out of 5. Not amazing, not terrible—just situationally useful.