1. Please use socket with stable voltage and keep the motor running within rated power to ensure long lifespan. ^2. Prohibit no-load running. Put the pump into water first before connecting power supply. When changing water, please disconnect power supply. It would shorten its lifespan and lead to making loud noises when running in the air for long time.^3. If the product suddenly stop working or make noises, which may caused by debris blockage. Please clean it regularly about once every two months, or add some olive oil on the rotor. ^4. The maximum flow rate is 200L/H; there might be a plus-minus tolerance, Insufficient power and insufficient frequency would affect the flow rate. If connected with a water pipe, the maximum flow rate would less than 200L/H. If the water sprays out the container, the flow rate would also less than 200L/H.