If the water pump isn't always equipped with a transformer, it can not instantly use 220V AC voltage!If the 220V AC voltage is straight connected with no transformer, the water pump could be damaged! (Note: The DC brushless pump is a centrifugal pump, the pump water move with the increase of the pinnacle decreases diving without self-priming function, prohibit no water free) Product features: Motor: brushless DC Material:PPE water-resistant level:IP68 RoHS:Meet RoHS environmental standards Principle:Centrifugal Performance parameters: Static lift:5 Open Flow:10 LPM Rated power:12W Noise:≤35dB Sealability:≥0 Insulation class:CLASS F(155℃) Life:20000H Scope of use: Ambient temperature:-25℃~70℃ Liquid temperature:0℃~100℃ environment humidity:Diving The variety of liquid:Liquid PROTECTION FEATURE: Reverse voltage protection When the opposite polarity,the pump should not be damaged,the pump can paintings properly after freeing opposite Locked-rotor defense When the rotor has a caught phenomenon, the pump routinely stops working till the problem is lifted to prevent the pump from overheating Notice: 1 product belongs to the centrifugal pump, needs to be put in within the liquid floor belowthe usual position 2 no longer use with 0 greater than the liquid impurities and instruction manual the magneticparticles three liquid within the pump, is strictly prohibited! To prevent high-speed rotation of the rotor to supply high-temperature wear inside constitution four utilizing a low-temperature environment, ensure that the liquid won't freeze or change into very viscous five be anticipated to low temperature frost heave the situation, to forestall the iciness water within the ice burst 6 brushless pump internal clearance exact control, is strictly prohibited beating; in any other case cause noise and vibration increase!