Feature: 1. High Quality Material: The volcano lamp is made of transparent plastic, which is safe and non toxic, has no harm to the water quality of the fish tank and fish, and can be used safely. 2. Combined with An Oxygen Pump: To achieve the "volcanic eruption" effect, create a more fascinating and realistic visual perception for the fish tank, and increase the oxygen content in the aquarium. 3. Stability: The disc shape can be stabilized at the bottom of the water tank, IP68 waterproof, excellent sealing design, can be completely immersed in water. 4. Easy to Install: Install the volcano lamp in the fish tank, connect the air pump and the power supply to get the landscape decoration of the volcanic eruption. 5. Practical: The power cord adopts a segmented joint design, which does not affect the perforation of the fish tank and is easy to install. One lamp has three functions, aeration, lighting, and viewing are indispensable. 6. Beautiful Landscaping: It is more interesting to simulate volcanic bubble landscaping. Oxygen is added to create oxygen, the bubbles are fine and uniform, and the light transmitting shape is beautiful. Specification: Item Type: Volcano Light Material: Plastic Size: Diameter: Approx. 8cm/3.1in Height: Approx. 9cm/3.5in Plug Type, Voltage: EU Plug, 100-240V Power: 2W Purpose: Aquarium Landscaping Decoration Bubble Lamp. Package List: 1 x Volcano Lamp (Including Power Cord and Plug) Note: 1.Please allow 1‑2cm/0.4‑0.8in error for manual measurement2.The bubble effect can only be achieved with an aeration pump. The aeration pump needs to be purchased separately, which is not included in this product.3.The power supply is not waterproof, so keep it away from water and steam.