{New Version Travel-size 4 Timer Modes} 100Ml Ultrasonic Diffuser Essential Oil Diffuser with Color Changing Led Lamps Aroma Humidifier with Waterless Auto Shut-off Function for Home Office Spa

I'm overall quite impressed by this very small diffuser. It's not a high-end or luxury product, but it isn't being sold at a high-end or luxury price, either. It does the job it was made to do at a better-than-expected level.The biggest surprise for me was the volume of mist it diffuses. I tried to grab a picture, which wasn't very easy to do, but give it a look. There is plenty of mist visibly coming from the unit, and it's able to fill a small room with diffused essential oils.Very easy to use. There's effectively three parts -- the power cable, the base, and a cover on top. The cover is held secure by a small click-into-place mechanism, just give a firm rotation (possibly too firm) counter clockwise to release it and pull it off. There are small black corresponding dots on the cover and base to help you line it back up when you put it back on--slide it all the way down, then firmly click it into place clockwise.The power cable is around 6 feet long, and can run discreetly under the unit with the cable going between two of the three feet on the base.The base has a 100ml water basin. There's no cup included unfortunately, but it's such a small unit (see picture of it in my not-that-big hand) it's easy to fill up at the sink, even though for me this included pulling off the power cord or awkwardly dragging it to the sink with me. Of course, you could use a small cup of your own to do this as well. The instructions indicate tap water is fine. No weird moving parts or anything as far as refilling is concerned, you put the water and essential oils in the basin and replace the lid and you're good to go. I'd say the only thing to watch out for is that the top cover does get a lot of condensation on it from the mist, so as I pull it off, I always make sure to angle it and aim the lowest point into the basin so the water will run off into it.I got about 4.5 hours of use out of it nearly filled, 4 and a half one-hour increments of time. I noticed that when the water is filled to the max line the mist is thinned out for a while until it gets a little lower, so I fill it just below the max line.Misting times are 30 min, hour, two hours, and three hours. A small LED indicator on the base shines through the top cover to indicate what time period you've set the diffuser to, which you rotate through by clicking the 'mist' button repeatedly. If you click it once more after reaching 3 hours (180 minutes), it will turn off. The instructions suggest allowing the unit to cool if you run it for the full three hours, it does get a little bit warm to the touch.There is also an automatic off. The beep that occurs whenever you press a button will beep twice to indicate empty, and the unit will shut off. A small amount of water is left when this happens, but probably only 2-4ml.Colors are great. They rotate until you lock one into place and can be turned off.There is a very gentle sound, almost like white noise. If there's any other sound in the room at all, you'll likely not notice it, but it's not much more than a soothing whirring sound in an otherwise silent room. If the water is close to full you sometimes even hear gentle bubbling, which I think is kind of nice.The small vibrating mechanism that makes the mist diffuse appears to be exposed at the bottom of the basin, I'm not sure if this is common, but the instructions say to avoid touching it or getting essential oils directly on it.Overall, I'm gonna give this 5 stars. I've been fairly strict about giving 5 star reviews since I became a reviewer, but when something goes above my expectations I think it's warranted. For the low cost, you're getting more diffuser than I personally thought you'd get, and there's no noteworthy issues with the design or function.Will update as to the device's longevity--I've been using it for about 2 weeks now.Product provided for review.