[5 in 1 Multifunction Salt Meter] measurement of , TDS, SALT, S.G. Temp. suitable for household drinking water, swimming pool, lab, and aquarium.[-capacity Battery] Use a 3V(CR2032) battery to provide , be durable, and be easy to replace, You can be bought everywhere.[High-precision Probe] With high sensitive alloy probe, can avoid the interference of the magnetic field in the water, reduce errors, and effectively prevent the damage of the probes during transportation.[Automatic Temperature Compensation] Temperature can affect reading levels, this tester has automatic temperature compensation of 0C-50 C can that your measure is correct.: Range: 0-19990us/cm,0-199.0mS/cmResolution: 1us/cm(Less than 1000us/cm), 10us/cm(Greater than 1000us/cm), 0.1mS/cmAccuracy: 2% F.S.TDS:TDS Range: 0-9990ppm 0-199.0pptResolution: 1ppm(Less than 1000ppm), 10ppm(Greater than 1000ppm), 0.1pptAccuracy: 2% F.S.SALT :SALT Range: 0-199.9ppt, 0%-20.0%Resolution: 1ppm(Less than 1000ppm), 10ppm(Greater than 1000ppm), 0.1ppt, 0.01%Accuracy: 2% F.S.S.G:S.G Range: 1.000-1.400Resolution: 0.001Temperature:Temperature Range: 0-50 32-122Resolution: 0.1/0.2Accuracy: 1.0(2.0)Operation Environment: 0-50Automatic Temperature Compensation: 0-50Battery: 1 x 3V(CR2032), not includeSize : 155 x 30 x 16mm,60gModel Number:PH-066Display Type:DIGITALcolor:White + greenMaterial:plasticPackage Contents:1 x Water Quality Tester(without button battery)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.