Note ** Product Property - Product that can adjust sea water level and salinity constantly by detecting the level of water tank - LED light ensure well display vision - Product that is currently exported to American Aquarium company. - It can be used every countries handling sea water tank ** Way to Use - Install water sensor 1,2 in the water tank. - Connect sensor and pump into main body of water level controller. - At this time, you can select maximum or minimum water level from position of sensor ** Precautions - Main body of product should be installed at dry area. - Main body of product should be avoided from water - Do not use close to magnetic field Certification Condition ** 2011 Patent utility model registration (Registration Number 20-0454001) Complete ** Power - 220V A.C, 60Hz , 110V A.C. 50,60Hz