Description: 1 Working voltage: DC 5V 2 Working current 7-12MA 3 One power indicator light, four water level indicator lights 4 Four water level output interfaces (low level 0V, high level 3.7V),for MCU IO 5 Four water level sensor interfaces (2P XH2.54) 6 Size: 32mm X 28mm X 11mm ...Description: 1 Working voltage: DC 5V 2 Working current 7-12MA 3 One power indicator light, four water level indicator lights 4 Four water level output interfaces (low level 0V, high level 3.7V),for MCU IO 5 Four water level sensor interfaces (2P XH2.54) 6 Size: 32mm X 28mm X 11mm(With Pin) 7 Weight: 4.6g(With Pin) Note: 1 Package does not contain probe (wire).2P Male XH2.54mm Pitch Wire Cable can be used as a probe,which can be purchased separately or prepared by yourself. 2 For safety, use an DC power supply with good isolation Application: for Arduino UNO MEGA2560 NANO Home water tower automatic water supply system Aquarium Fish tank Water Changer System Fill the water tower automatically Automatic pumping from water tower Conductive liquid automatic control Automatic feeding system for poultry and livestock Farm automatic water supply system And other occasions that require automatic water supply and water exchange. Solenoid valve water pump motor automatic control Package inlcuded:1x DC 5V 4 Outputs Water Liquid Level Indicator Board