pH/ORP controller, range: 0.00 to 14.00 pH / ±1000 mV with ±0.2 pH / ±5 mV accuracy with 2 selectable set points for pH and ORP and 2 power plug sockets for CO2 and ozone dosing. Supplied with 12 VDC power adapter, MA911B/2 double junction pH electrode and MA921B/2 ORP platinum electrode.