The most advanced type of Controller with which it can simultaneously measure and display the pH value and redox value (ORP) as well as the other all at the same time which is contrary to almost all other PH/ORP controller. Applications & Usage: Fish hatchery, wine production, swimming pool (bath), laboratories, water conditioning, schools & colleges, floristics, for analysis of fluids (pH value), ponds, various industrial application, Pisciculture, Koi, Kois, Boiler, Pond, Pool, Spa, swimming pools, pool, analysis of liquids, orchids breed, breeder, hemp, grow, etc. The suitable way for you to keep an eye on the different water parameters in your tank. Features: Display pH value and redox value (ORP) With 2 probes (pH and redox) 2 circuits and 2 switched sockets. Simultaneously measure pH & ORP and control other pH & ORP related CO²-plant (via pH value) and an ozonizer (via orp value)Simultaneously regulates the pH and redox values in liquids Power Plug for CO2 and Ozone Solenoids or Dosing Pumps are provided Replaceable pH & ORP Electrodes Uses the Protection Dead Band feature Gives you an option to mount it on the wall or hung on Specifications: Display: double 4 LED, DUAL display reading Conformity: CE and RoHS Measuring range PH: 0.00 ~ 14.00pH ORP: -1999 ~ 1999mV Accuracy PH: ±0.1%+0.02PH ORP: ±5mV Resolution PH: 0.01pH ORP: 1mV Set Range PH: 3.50 ~ 10.50pH ORP: -500 ~ 500mV Relay Contact: 5A for AC 110V or 220V Environment Operation Temperature : 0 to 50 °C (32 to 122 °F) Ambient Humidity : 90 or less than 90 % R. H. Power Requirement : AC110V ±10% 60Hz / AC220V ±10% 50Hz Power Consumption : 2 Watts Voltage: 220V or 110V Dimensions: 160 x 102 x 40mm Weight: 872g Set Includes: 1 x Dual Controller for pH & ORP 1 x set of 4.003 and 6.864 calibration (buffer) solutions 1 x English Operation Manual 1 x Adaptor 1x Detachable pH electrode 1 x Detachable ORP electrode 2 x Rubber cable holder with suction cap 1 x Mini-screwdriver Metal Holder