Features:Made of superb plastic material, it is durable in use. Clear reading day and night thanks to its backlit screen. 5 in 1, PH/EC/TDS/temperature and salinity measurement, one price for multiple use. IP67 water resistance and integrated cell operation, mini size and lightweight for a better using experience. Ideal for measuring drinking water, laboratory, industrial wastewater, aquarium, swimming pool, aquaculture, rice fields, etc. br/>Features: Material: P plastic Color: White & Black Power supply: 3 * 1.5V 160mAh LR44 Cell (Included) Measuring range: TDS: 0-1000 ppm CE: 0-10000US/cm Salt: 0.00-25.00Salinity of sea water: 10.1-200.0ppt Temperature: 0.1~60.0(32.0-140.0) Accuracy: 0.01-5.00% (0.1%) 5.01-25.00%1% Backlight: supported Water resistance: IP67 Screen display size: 33*24mm Package size: approx. 183*37*37mm Package weight: approx. 177g Packing List: 1 * Water Quality Analyzer 1 * User Manual (English)