It is high-performance， large volume. This air pump is ideal for small and medium-sized fish tanks. It is perfectly suitable for using at all kinds of high-grade aquarium， aquaculture oxygenation， spout decoration， etc.Features:Made of environmental plastic material and fashionable curve design， durable for use.Low-power， economic power-saving， continuous operation and long service life.High-performance， large volume， ideal for small and medium-sized fish tank plus oxygen.Double-headed pump: there are two vents， which can provide oxygen to two fish tanks at the same time.A good supply for people who like feeding aquatic pets.Specifications:Color: BlackMaterial: PlasticVoltage: 220V/50HzPower: 5WAir Output: 3.5L/minDimension: Approx. 10.5 * 7 * 4cm / 4.13 * 2.76 * 1.57in (L * W * H)Item Weight: 243g / 8.57ozPackage Size: 13.5 * 8 * 6.7cm / 5.3 * 3.15 * 2.6in (L * W * H)Package Weight: 273g / 9.62ozPackage List:1 * Air Pump