Today I’m going to speak about Cool Mist Ultrasonic Aroma Diffuser Set from Walmart. This specific set lasts up to 3 hours. It has 2 essential oils, Lavender and Eucalyptus. These are liquid essential oils just to clarify lol. This Diffuser also has Auto shut-off when water level runs low. Mine is a nice light beige color with a white base. I just opened it up and noticed it powered by a usb micro cable. This does not plug into the wall at all. I have to plug this into a charger of some sort or a computer. This might be the reason its only good for 3 hours. I definitely wouldn’t trust this thing overnight while I’m sleeping. This product is $20 so for the price I’m not complaining. Between the electric motor and the 2 essential liquid oils it’s worth the money. My expectations got the best of me and my assumptions were wrong. I thought this would come with its own plug for the wall or at least its own usb plug charger but I am wrong. I do have one physical evident complaint. The usb micro port has green spots on it. This is an indication that some type of moisture or water go into the port so I’m skeptical that the one I bought was a returned product or refurbished. I’ll plug it in and see if it works and considering the port looks healthy otherwise I may be able to use some isopropyl alcohol and clean up any rusting residue. I hope this product works and I’ll plug it into my computer so I can smell the great fragrances while I continue my blog and other activities online. My only worry is that the port doesn’t work like it’s supposed too because of the rusted contacts and it shorts out and hurts my computer. The $20 makes this item worth it but it’s got me worried for the sake of a fire starting so if you are going to pick one of these diffusers up keep an eye on it and unplug it while you are away from home. Just like the coffee pot! As always I’m leaving a link down below and in the sleep gallery for your own buying curiosity.