SPECIFICATION: Optional three-point calibration: 1413uS /12.88mS /111.8mS Temperature compensation: ATC Auto power off: 5 minutes Temperature range: 0.1-80.0C (32.0-176F) Temperature accuracy: +0.5C Temperature resolution: 0.1 C/F Power: 3x1.5 LR44 Size weight: 159*34*16mm(6.31*1.3*0.6in) /60g(2.1oz) 5 in 1 MODE: 5 in 1 tester, you can accurately measure TDS, EC, SALT, SG, Temp value; Clearly know the water quality to ensure the health of your family members. HIGH PRECISION: With highly sensitive probe, you can quickly read the results; wide measuring range and high resolution ensure that you can measure different kinds of liquids AUTOMATIC TEMPERATURE COMPENSATION: With ATC function, the 5-in-1 meter solves the inaccurate measurement problem caused by temperature change. liquid temperature; Easy to get a reliable and stable reading EASY TO USE: After calibration, place the sensor in the solution you want to test and get the data immediately; Before another test, wash the probe thoroughly; Or you may get an inaccurate reading WIDE APPLICATION: The portable water quality tester can be carried anywhere to measure water quality such as tap water, l RO system water, aquarium, sea water, swimming pool water.