Description: 1. Support meter calibration function, support lock function and low voltage alarm. 2. Can make PH value detection, voltage detection, temperature detection. 3. Suitable for laboratory, industrial, sewage , scientific research, pharmaceutical. 4. Usage: the pen, open the switch, put the test solution stir, the value can be read the value of stability. 5. PH measurement range: 0-14PH. And can change the accuracy of pH display. Specifications: Screen: LCD display Display type: digital Color: white + blue Style: pen style Working voltage: 3.3V PH measurement range: 0-14PH Voltage measurement range: 0~828mV Temperature measurement range: 0.0~50.0°C (32~122°F) Battery: LR44 battery (not included) Feature: 2 in 1, portable, waterproof, high accuracy Package size(approx.): 205 X 75 X 45mm Package Included: 1PC * 2 in 1 PH Meter Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2cm differences due to manual measurement.