The NeXtime "Milky Way Dome" is a wall clock made of plastic and glass with the latest glow-in-the-dark technology. The clock needs to be hung in the daylight to be able to charge. The ends of the hands and galaxy will then light up in the dark for approximately 4 hours. This clock shows a mesmerizing image of our galaxy and is silent. It runs on 1 AA battery (not included).