Features DEAL WITH 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 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 station WITH BACKLIGHT: 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 Specification: Item Type: TDS Meter Material: ABS Battery: 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 station Basic Parameters: Measuring Range: 0~9990ppm Package List:1 x Tester1 x Storage Bag 1 x User Manual Package List 1 x Tester 1 x Storage Bag 1 x User Manual