Professional COM-100 EC Analyzer TDS Meter Temp Tester With Automatic Calibration And Data Hold Measurement Tools For pool 40 percent OFF EC Range: 0 - 9990 µS 0 - 9.99 mS TDS Range: 0 - 8560 ppm (mg or L)0.7(442)scale 0 - 8.56 ppt:0.7(442)scale,0-500PPT (NACI)scale 0-5000ppm(mg or L) 0.5(NACL)scale Temperature Range: 0-55 °C 32-130 °F Resolution: EC:0-99:0.1µS 0-999:1µS 1000-990:10µS 0-9.99ms:0.01ms TDS:0-99:0.1ppm 100-999:1ppm 1000-9990:10ppm 1-8.56:0.01ppt Temp. resolution:0.1 °C or F Accuracy: 2 percent Calibration: Digital calibration by push button. Power source: 2pcs AAA Battery(Not included). Colour: As Shown Material: Plastic Package Contents: 1xwater quality detector 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.