This QWORK 12V submersible water pump offers a flow rate of 840 liters per hour and a maximum lift of 5 meters. It is designed for various applications including fish tanks, soilless cultivation, and garden watering. The pump features a small size, high efficiency, low consumption, and low noise operation. It is suitable for garden irrigation, ponds, fresh and salt water aquariums, fountains, and filter systems. Please ensure correct polarity when connecting the power: brown wire to positive and blue wire to negative. The yellow and green wires do not need to be connected. This is a submersible pump and cannot be used as a self-priming or land pump. The water temperature should not exceed 40 degrees Celsius.