Made of wood, glass, metal and acrylic. The crystal on the front flashes green, whilst the valve on the side flashes through the colour spectrum (RGB). Comes complete with a real brown leather belt hanger. The LEDs are powered by a 9v (smoke alarm) battery (supplied). Operation is simple, with the flick of the switch the device springs to life. Measurements are approximately 115mm wide x 125mm high x 65mm deep. Please note this is not a toy and unsuitable for children under the age of 16.