Range pH 0 to 200 mV 0 to 2000 Accuracy pH --- mV ± 1 mV ± 1 digit Resolution 0.1 mV Slope correction 80% to 120% Ambient Temperature 0º C to 50º C Display 3œ digit LED display Power 230 V ± 10% 50Hz AC Dimensions 275x175x85 mm use this product  1) Glass, Reference , Silver and Platinum Electrodes 

1.Free 2 Electrode within

2 Dust cover 

 3) Instruction manual.