Feature:1. DEAL WITH VARIOUS OCCASION: TDS test pen is suitable for domestic water, aquaculture, swimming pool and other water quality detection2. HIGH SENSITIVITY PROBE: Water quality instrument has alloy probe and high sensitivity glass electrode, realize high accuracy water quality measurement, support automatic temperature compensation, reduce error3. SCOPE OF USE: Water quality tester can be used for domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, aquarium water quality, greenhouse flowers, bottled water, community water station4. WITH BACKLIGHT: The water quality tester automatically turns on the backlight display when turned on, allowing you to see the value even in dim conditions5. CELSIUS FAHRENHEIT DEGREES SWITCH: TDS meter with temperature unit switch function, very flexible and practicalSpecification:Item Type: TDS MeterMaterial: ABSBattery: 2 x 1.5V LR44 button battery(not included)Application: Domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, fish tank water quality, greenhouse flowers, bottled water, community water stationBasic Parameters: Measuring Range: 0~9990ppm.Package List:1 x Tester1 x Storage Bag 1 x User Manual