When you plug it in, the illumination lights up, and bubbles rise through the glass tube inside. It was used for about 3 hours only at night for 49 days after purchase. There are no scratches or stains, and it is in beautiful condition. A spare bulb is also included. It takes a few minutes for the bubbles to start after plugging in the power. The decorations will be removed from the main unit for packing, so please assemble them when using. The main unit dimensions, with decorations attached, are: Height approx. 33cm Width approx. 15cm Cord length 140cm