Description: Fast and Accurate Readings, Large LCD display Automatic Calibration:No need any adjustment screwdrivers, just finish the calibration with Auto calibration butt(NOT included buffer powders). ATC Function:Automatic Temperature Compensation accounts for changes in temperature automatically; Full measurement range of pH 0-14, 0.01 pH resolution. Handheld pen style and compact carrying case. Ideal for home and laboratory pH testing applications, including drinking water, swimming pools,aquariums,hydroponics etc. Specification: Material: Plastic Color: As Pictures Shown Size: Approx. 15.3x 2.9x 1.6cm/ 6.02x 1.14x 0.63inch Measure Range: 0.00-14.00pH Resolution: 0.01pH Accuracy: 0.01pH Operating Temperature: 0℃~80℃ Power Supply: 2 * 1.5V (Not Included) Calibration: automatic calibration Package Includes: 1 Piece Digital PH Meter Tester Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.