Low Consumption: Extremely efficient, very low current consumption and offers high output power. Compact Size: Small size, light weight, does not take up too much space, quiet operation, low vibration. Large Flow Rate: The water pump has a large water outlet with a large flow rate and can drain water quickly. Method == Blue positive and black negative are fully automatic work, red positive and black negative are semi-automatic work, red and blue cannot be connected at the same time, semi-automatic needs to be manually turned on and off. Waterproof: Totally submersible and ignition protected with an anti-air design and a moisture-proof seal.