1 SEKO PH meter/ ORP meter 2 Measurement range:PH:0--14,ORP:-1000--+1000mV 3 Universal power supply:AC22-- ... 265(V) Model:PR75C ,PR75A ,PR75BDisplay mode:LCD display with ... high contrast with characters of 15mmMeasurement range:PH:0--14,ORP:-1000--+1000mVResolution:2%Universal ...