Model: 420001 - Quantity: 1 - Color: White - Material: Plastic - Screen size: 0.8" - Measurement range: 0~999ppm / 1000~9990ppm - Resolution: 1ppm / 10ppm - Also available in "x10" mode: reads in increments only of 10 ppm (0-9990 ppm) - Accuracy: +/- 2% - Powered by 2 x LR44 batteries (1.5V / Included) - Ideal for commercial use. Includes a carrying case with belt clip - Ideal for all water purification applications wastewater regulation aquaculture hydroponics and colloidal silver - Highly efficient and accurate due to its advanced microprocessor technology - Packing list: - 1 x TDS-3M tester - 2 x Batteries - 1 x Chinese / English user manual - 1 x Carrying case