Lovely way to keep the night terrors away for children or a nightlight in general!!! Gorgeous stones glow in the dark when turned on. Very soothing, gentle colors for discreet lighting at night. Comes in 2 variations - Amethyst (purple) and Green Fluorite. Each is a little different in how its "shell" is made, some are taller or flatter than others. Approx. 5"x3.5" attached to a 36" usb cord with a button switch. (Does not come with usb adapter plug). Sold in sets of 6 assorted.