Features: The hold function saves the measured value, and the large digital display is easy to read and record. Automatic shutdown function, automatically shut down when not in use, saving battery power. A variety of calibration algorithms, aluminum alloy precision probe, more accurate measurement. A wide range of applications can be used in water purifiers and filters, food (vegetables, fruits) and beverage quality monitoring, swimming pools and spas, aquariums, hydroponics. Made of high-quality ABS plastic material, strong acid resistance, high pressure resistance, heat resistance, flame retardant, 2 battery compartment buckle design, it is more convenient to replace the battery. Specification: Material: ABS+electronic components Size: 5.98*1.1in/15.2*2.8cm Color: gray, white, blue, yellow, orange, red Package Includes: 1pc Notes: Please allow minor errors due to manual measurement. The colors may be a little difference for the different monitor display.