Model TS-210 Parameter pH/ORP Display Graphical, Backlight Graphical Menu Yes, with setting overview Measuring Range -2~20pH -2000~2000mV Resolution 0.01pH 1mV/0.1mV Accuracy ±0.01pH ±0.05% Temperature Compensation NTC30K / PT1000 ATC and MTC AutoRead Yes Data storage 100 sets Data transmitting -- Calibration record The last 1 pH Sensor status Yes Battery status Yes Power supply 4 x 1.5V AA or 1.2V NiMH Sensor connector BNC , Banana Operating hours 380 hours or 200 hours(backlight) Size/Weight 194mm x 82mm x 38mm (L x W x H)/0.25kg Protection IP65