Features FOR VARIOUS OCCASION: TDS test pen is suitable for domestic water, aquaculture, swimming pool and other water quality detection 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 error WITH BACKLIGHT DISPLAY: The water quality tester automatically turns on the backlight display when turned on, allowing you to see the value even in dim conditions CELSIUS FAHRENHEIT DEGREES SWITCH: TDS meter with temperature unit switch function, very flexible and practical APPLICABLE SCENARIO: 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 station Specification: Item Type: TDS Meter Material: ABS Battery: 1 x 3V CR2032 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 station Basic Parameters: Measuring Range: 0~99990ppm Package List:1 x Tester Package List 1 x Tester