Features: Long life, low noise, environmental and energy-saving. Operate inside/outside the cold or hot water. For indoor and outdoor use, sustain heave duty work for 24 hours. Life expectancy is over 20000 hours at normal condition. Widely used for aquarium, fountain, small fish pond, solar system, radiators, water circulation system, medical equipment, etc. Specifications: Maximum Input Voltage: 12V DC Maximum Input Current: 500mA Maximum Power: 6W Fluid Temperature: 32~149℉(0~65℃) Flow: 2L/min Wire Length: About 50cm/19.7in Wiring: Red(+); Black(-) Noise: ≤35dba Fluid: Water Inlet Diameter: About 9.8mm/0.4in Outlet Diameter: About 6.8mm/0.3in Weight: 64g(approx.) Note: Please allow small size error due to manual measurement. Thanks for your understanding. .