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(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)