Wide measuring range with ATC (Automatic Temperature Compensation) Data hold function Auto-ranging function Low battery indicator Manual and Auto power off C/F switchable temperature unit Salinity units: ppm / ppt / % / S.G. specific TDS units: ppm / ppt Multi points and calibration Can be calibrated with conductivity buffer solution which is the most easy available option Measurement Range: Salinity: 0-9999ppm or 10.0-100.0ppt or 0.0%-10.0% or 0.950-1.080(S.G) based on NaCl TDS: 0-9999ppm or 10.0-160.0 f ppt (f is TDS factor) Temperature: -5C-60.0C (23F-140F) Accuracy: Salinity & TDS: 1%F.S 1 digit Temperature: +/-0.5C Color: As Shown Material: plastic Package Contents: 1 x salinity meter 4 x button batteries 1 x Chinese and English instruction manual 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.