Potting Soil -PH Meter Pen PH Meter Highlights PH Meter Pen Generic Brand PH Meter Pen Description: Fast and accurate readings, large LCD screen Auto Calibration: No adjustment screwdriver needed, just complete calibration with the automatic calibration stop (NO buffer powders). ATC function: Automatic temperature compensation automatically accounts for temperature changes; Full pH measurement range 0-14, 0.01pH resolution. Pocket pen 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 Measurement range: 0.00-14.00pH Resolution: 0.01pH Accuracy: 0.01pH Operating temperature: 0~80 Power supply: 2*1.5V (not included) Calibration: auto calibration Package Include: 1 Piece Digital PH Tester Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.