The Extech EC410 kit includes EC400 ExStik® Conductivity/TDS/ Salinity Temperature Meter, with sensor, protective cap, three calibration standards, (30mL bottle each), weighted base, 3 sample plastic cups, with caps, four 3V CR-2032 batteries, 48 in. (1.2 m) neck strap, and carrying case. Autoranging meter offers 3 ranges of measurements from tap water to wastewater and any aqueous solution. Automatic Temperature Compensation of 2% per °C. Data Hold, Auto Power Off and low battery indication. Internal memory stores up to 25 labeled readings for easy recall.