[5 in 1 Multifunction Salt Meter] professional measurement of EC, TDS, SALT, S.G. Temp. suitable for household drinking water, swimming pool, lab, and aquarium. [-capacity Battery] Use a 3V(CR2032) battery to power, 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 levels, this tester has automatic temperature compensation of 0C-50 C can that your measure is . EC: EC Range: 0-19990us/cm,0-199.0mS/cm Resolution: 1us/cm(Less than 1000us/cm), 10us/cm( 1000us/cm), 0.1mS/cm Accuracy: 2% F.S. TDS: TDS Range: 0-9990ppm 0-199.0ppt Resolution: 1ppm(Less than 1000ppm), 10ppm( 1000ppm), 0.1ppt Accuracy: 2% F.S. SALT : SALT Range: 0-199.9ppt, 0%-20.0% Resolution: 1ppm(Less than 1000ppm), 10ppm( 1000ppm), 0.1ppt, 0.01% Accuracy: 2% F.S. S.G: S.G Range: 1.000-1.400 Resolution: 0.001 Temperature: Temperature Range: 0-50 32-122 Resolution: 0.1/0.2 Accuracy: 1.0(2.0) Operation Environment: 0-50 Automatic Temperature Compensation: 0-50 Battery: 1 x 3V(CR2032), not include Size : 155 x 30 x 16mm,60g Model Number:PH-066 Display Type:DIGITAL color:White + green Material:plastic Package 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.