The controller is designed for aquarium controlling.It process is directly and efficiently perceived through the senses.The autocontrol including temperature, pump an lights.The customer setting can be remembered when the power shut down.For the physical desigh, we seperate the high voltage circuit from the controlling circuit.This is safe for the operating personnel.The power board print every output name , such as light, uv, .Etc.The controller is necessary for aquarium. CARTONS