<strong>Features:</strong> Made of superb p lastic material, it is long lasting use. Clear reading in both day and night for its d design backlit display. 5 in 1 PH/ EC/ TDS/temperature and salinity measurement one price for multi-use. IP67 water resistance and operated by built-in cell, mini size and lightweight for better use experiment. Nice for measurement of drinking water, laboratory, industrial waste water, aquarium, swimming pool, aquaculture, rice fields, etc. Black Power Supply: 3*1.5V 160mAh LR44 Cell<strong>(NOT Included)</strong> <strong>Measurement Range:</strong> TDS: 0-1000ppm EC: 0-10000US/cm Salt: 0.00-25.00％ Sea water 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: Backing Waterproofing: IP67 Screen size: 33*24mm Package size: approx. . 183*37*37mm Package weight: approx. 177g