Feature 1、2 in 1 Controller: This 2 in 1 pH and ORP controller and monitor simultaneously measures and displays pH and redox (ORP). 2、2 BNC Electrodes: It comes with 2 BNC electrodes (pH and redox) and 2 output power sockets, both electrodes are removable and can be easily replaced at any time. 3、Relay Output Power Socket: As for the relay output power sockets, you can plug in your own 110V or 220V devices, such as vent stones, O3 ozone generators, oxygen pumps, CO2 regulators, solenoid valves and other ORP and pH control devices. 4、How It Works: If the currently measured pH or redox value is lower than your set value, it will turn on your device, if the measurement is higher than your set value, it will turn off your device. 5、Simple to Use: This digital redox controller uses simply, just need to set the desired high or low pH or redox value in the controller.Item Type: Digital Redox ControllerMaterial: ABSGross Weight: 1083g / 38.2ozMeasuring Range: 0.00-14.00PHAccuracy: ±(0.1%+2 bits) after calibrationResolution: 0.01PHSet Control Range: 3.50-10.50PHAmbient Temperature: 0-50℃, humidity ＜95%Display: 4 LED displayPlug: EU Plug 220VUses: Suitable for fish hatcheries, wine production, swimming pool (baths), laboratories, water regulation, schools and colleges, botany, fluid analysis (pH), pond, various industrial applications .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x PH Controller1 x Electrode1 x Manual1 x Calibration Pen1 x Holder1 x Suction Cup