Protable Digital PH Meter Tester Aquarium Pool Water Wine Urine LCD Pen Monitor Ice CrystalsThis is your secret 、a wonderful store、bangbangbangSpecification: （Measuring pH Range: 0.0 - 14.0 pH（Resolution: 0.1 pH（Accuracy: ∥0.1 pH (at 20§C/68§F)、 ∥0.2 pH（Operating Temperature: 0 - 50§C (32 - 122§F)（Calibration: Manual、 1 point（Relative Humidity: <95%（Life: Approx.700 hours of use（Size: 152mm x 30mm x 15mm (5.9x1.2x0.6")（Trimming: By potentiometer（Battery: 3*1.5v (AG-13 button battery) (included)（Net Weight: Approx. 57g (after installed batteries) Package: （1 x Digital PH Meter Tester Pen（1 x Calibration Adjustment Screwdriver（3 x Button Cell Batteries (included)（1 x User Instruction Manual (English)NO Retail Box. Packed Safely in Bubble Bag