I love this diffuser!!! I have others but none are wireless/ cordless. It took 2hrs to charge it fully from initial start straight out of box. Once it is fully charged the red light will go off and you can unplug. The water canister is on the small side so you won't be able to fill too much. I Love how I can move it from room to room since I dont' have to deal with finding a plug. The Glass is heavy so you will have to be very careful when lifting it to turn it on or off or to turn light on or off. This is a lot more practical than the plug in ones even tho my other plug in ones will hold much more water. The small essential oil that comes with it does not have a label. Mine smells like spearmint. The top center of the glass I think is made of terracotta. This is Beautiful!!!!!!!!!!!!!!! A must get!!!!!