ELECTRIC CONDUCTIVITY METER TDS RANGE 0 TO 999.9 PPM 1.000 TO 400.0 G/L ELECTRIC CONDUCTIVITY RANGE 0.001 TO 999.9 US/CM 1.000 TO 1000.0 MS/CM SALINITY RANGE 0 TO 400.0 0 TO 80 PSU 0.01 TO 42 PSU DISPLAY BACKLIT GRAPHIC DUAL LEVEL AUTO POWER OFF AUTOMATIC CALIBRATION POWER SOURCE 4 AA RECHARGEABLE BATTERIES INCLUDES PROBE BATTERIES BATTERY CHARGER AND INSTRUCTIONS