Features:1. There is no power supply for the pump. The power supply should be separately provided. Pump is DC pump, 3V pump, with DC3-4.5V power supply. (cannot be used directly with 220V AC voltage)2. Large flow, durable, long life.3. Low noise, stable performance, energy saving, energy saving and environmental protections.4. Engineering plastics, safe and explosion-proof.5. Small and light, compact and easy to install.6. Water pump back resin seal, good insulation, water - proof, easy to clean, explosion - proof safety, environmental protections.7. Low voltage dc 3V, high efficiency, small size.The product is only half a palms size, strong power, stable performance.8. High efficiency and energy saving, pure copper coil. Wear resistance small motor: bearing greater torque, longer life, super mute.9. Wide application: a variety of technical fountain, aquarium, rockery, pond.