PH METER (High Accuracy Meter) Specification: Range Ph: 0.0 To 14.0 Ph Resolution Ph: 0.1 Ph Accuracy Ph: ±0.1 Ph Calibration: Manual, 2 Points Battery Type / Life: 4 X 1.5v / Approx. 700 Hours of Continuous Use Environment: 0 To 50°C (32 To 122°F); Rh Max 95% Dimensions:175 X 41 X 23 mpm (6.9 X 1.6 X 0.9”) Weight: 95 G (3.4 Oz.) ORIGIN: GABY INSTRUMENTS