COOL KNIGHT Electric Herb Grinder Spice Grinder, USB Rechargeable 200W Cordless for Herbs, Spices, Seeds, etc. (Black)

I recently purchased this amazing multifunctional grinder and I'm absolutely in love with it! It's made of high-quality stainless steel, has a powerful motor and a large capacity battery which allows it to operate at a very high rotational speed. I was able to grind 120g of medicinal material within 5-10 seconds which is just remarkable! The unique shape of the blade allows it to grind in a 360-degree direction which makes the process even faster. Plus, the borosilicate glass design allows you to watch the whole process of grinding which is so cool! The grinder is also very easy to clean. All I need to do is just pour a small amount of water into the glass jar and start the grinder for a few seconds and it will start the automatic cleaning process. Plus, the customer service is outstanding. If I have any trouble during use, I can contact them and they will provide the best solution. I'm so satisfied with my purchase and I highly recommend this product to everyone! It is truly a thing of beauty!

It’s a really great product, but we had to be REALLY careful. The description seemed like you held down a button while it ground and released to stop, but it’s touch-start and stop. It’s also VERY sharp, fast, and DEFINITELY makes the whirlwind described which is all good; but it grinds a bit faster than expected so we have to watch carefully and ALWAYS stop it before the instructions say to or we end up with unusable powder for things like coffee (it’ll go straight through the filter or clog it depending on filter type).So basically the pros are also cons, but as the blades eventually dull I’m sure it won’t be as big a deal. In the meantime it was wonderful to find a grinder that actually works well and didn’t have to be shaken while in use to get an even grind

Durability. Ease of use

Okay, let's pro/con this little guy:Pros:1) I really like that the jar keeps everything contained, so there's no loose grounds escaping around the rim of the grind cup.2) The motor is powerful enough to be able to get a good fine grind as long as you don't overfill it.3) It's portable and the battery lasts a good long while. It would be great for camping.4) The safety lock-out on the jar means there's no chance of it accidentally turning on with the jar off.Cons:1) The jar is a little small. This isn't really an issue for me, since I'm using it as a spice grinder, but it would probably take 2 jars full of beans to make a full pot of coffee.2) Not easy to clean since the blade is permanently attached to the motor, and the blade configuration makes it hard to get everything out from between the blades. This would actually be less of a problem if I were using it for coffee, but it’s a challenge for a spice grinder if you don't want flavors overlapping from one herb to the next.3) The one thing that I really wish were different is that the motor only runs for a few seconds at a time before turning off. For lightweight materials like dried herbs that I want ground fine, this means that I have to cycle it on over and over until I get to where I want to be. If it would just run as long as I held down the button, that would be MUCH better.The short power cycle is my biggest detractor, but it’s manageable. It's fairly unique because of the fully enclosed jar, and I love that feature for a spice grinder. So, not quite perfect, but I'm still pretty happy with it.

I bought this after reading reviews and though I understood how it worked. My experience trying to grind flaxseeds was a waste of time. I charged the unit, but it is pretty funky, the charger doesn't fit properly into the unit. When I pressed the "On" button and held it for three seconds, I was surprised that the blades only spun for less than one second. I had watched the manufacturer's video, and that is not how my grinder functioned at all. After reading the instructions again, I added a little more flaxseed to the bowl. It still did not work properly. I had to press the grind button over ten times to grind a little over three tablesoons of flaxseed. Then when I tried to grind again, about a week later, the charge was gone. After recharging it, I barely pulsed when I pushed the "on" button for the requisite three seconds. There have got to be better grinders out there for flaxseed.

Highly recommend this purchase to anyone in need of a great cordless grinder. Yes it works awesome on cannabis flower & grinds it to a perect consistency for flower vape, bowl or rolling. My beloved wife "had" Cancer & after 16 months of healthcareless hiccups, chemotherapy, radiation chemo & 2 surgeries, she's on the mend hovering around 85 lbs. And Yes, I contribute much of her survival to cannabinoid intake with REAL science to back it up, not fauci/political science. The grinder is also a wonderful little coffee or spice grinder. We enjoy our coffee very much too & grind it fresh with fresh hazelnut & cinnamon. Not sure what these few bad reviews are all about. I've bought 1 & recommended to 3 others that purchased & very happy as well. Be sure to keep the magnetic collar clean which is the device that allows the grinder to turn on. If it doesn't charge, you're either not sing the heavier charge cable it came with or you're not plugged into a full 5 watt USB outlet which it needs to adequately charge. So no, your pc tablet or tiny powerbank likely won't do it.