Features: Made of superb p lastic material, it is long-lasting use. Clear reading in both day and night for its backlight display design. 5 in 1, PH/ EC/ TDS/temperature and salinity measurement, one price for multiuse. IP67 water resistance and operated by built-in cell, mini size and lightweight for better use experience. Nice for the measuring of drinking water, laboratory, industrial waste water, aquarium, swimming pool, aquaculture, rice fields, etc. Specifications: Material: P lastic Color: White & Black P ower s upply: 3 * 1.5V 160mAh LR44 Cell(NOT Included) Measurement Range: TDS: 0-1000ppm EC: 0-10000US / c m Salt: 0.00-25.00 Seawater salinity: 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: Support 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)