1、Two‑color backlight display, the display color is green within the normal value. If the value is too high, red is displayed. 2、Widely used in drinking water, fish tank, swimming pool, laboratory, farmland irrigation, sewage treatment. 3、There are 4 different modes in this instrument, press MODE to switch between different modes. 4、3‑in‑1 meter design. It can be used to measure the TDS, EC and temperature of the solution. 5、High sensitivity probe, high sensitivity and quick response, small size, lightweight, easy to carry and simple to operate. 1 x Water Quality Tester(Battery Not Included)1 x Instruction Manual Item Type: Water Quality TesterMaterial: ABSColor: As shown in the pictureSize: Approx.31x155mm/ 1.22x 6.1inWeight: Approx.85g/3ozApplication: Water quality analyzerTDS Measuring Range: 0~9999PPMAccuracy of Conductivity Measurement Range: 1ppm & 1us/cmMeasurement Items: TDS value, Celsius, Fahrenheit, EC conductivityTemperature Range: 0.1~ 80.0℃/ 32.0~ 176.0℉Battery: 3V 2 x button battery AG13 150MAH (Not Included)