Fast, reliable and easy to use: just dip the TDS meter, stir and get results in seconds. No calibration or setup required, out of the box DURABLE UPGRADED ACCURACY: With titanium probes and the latest sensors, you get near-accurate readings every time. What's more, the digital TDS water quality tester can be easily recalibrated to improve accuracy when needed Ideal for any type of TDS or EC test: Check the total dissolved solids or conductivity of your aquarium, swimming pool or any water source. You can determine the effectiveness of RO, DI or distillation units, check nutrient levels in hydroponic units and more. Material: ABS plastic color: White Measuring range: 0-9999ppm&0-9999us/cm TDS range: 1~9990ppm Conductivity range: 1~9990us/cm Resolution: 1ppm&1us/cm Test items: TDS value, EO conductivity, temperature Package Included: 1 x Digital Water Quality Tester