Features: 1. Circulation pump is non-self-priming pump. This pump is centrifugal pump, it can't vent the air automatically, so it must be operated by submersible installation.Fit for fountain, pool, pet aquarium, fish tank, solar circulation system, water circulation system, hydroponic systems. 2. 2 sizes of the water outlet,easily connect with a hose, detachable and Cleanable. No need any tools to detach it, easy to separate, easy to clean. 3. The stator and circuit board of the motor are potted with epoxy resin and completely isolated from the rotor, which solves the leakage problem caused by long-term diving of the motor-type DC water pump, and is completely waterproof (waterproof grade: IP68). 4. Submersible installation and entirely waterproof, the point straight in line with the pump body is the water inlet, vertical to the pump body is water outlet. 5. Long working life (more than 30,000 hours). Small size, high efficiency, low consumption, low noise (less than 35db). Specifications: 1. Material: plastic & magnet 2. Voltage:DC12V 3. Power:20w Caution: 1. Damage is possible if the pump work without water. 2. There might be performance tolerance becuase of the tolerance of your local voltage and frequency.