EC410 kit includes EC400 ExStik Conductivity/TDS/ Salinity Temperature Meter, with sensor, protective cap, 84?S/cm, 1413?S/cm and 12880?S/cm calibration standards, (30mL bottle each), weighted base, 3 sample plastic cups, with caps, four 3V CR-2032 batteries, 48-Inch (1.2m) neck strap, and carrying case.