The Extech EX800 ExStik 3-In-1 Kit includes the CL200 meter and pH electrode, reagent tablets (50 tests), four plastic cups, a weighted stand, pH buffer pouches, four CR2032 batteries, 48 inch neck strap, carrying case, and user manual. The meter measures Total Chlorine, pH, and Temperature with interchangeable flat surface electrodes that are included. Flat surface electrodes work in liquids, semi-solids and solids. Built-in memory can store/recall up to 15 readings and save the last calibrated value. It has a large 3-1/2 digit (2000 count) digital display with a bargraph and an automatic electronic self-calibration function for Chlorine (1, 2, or 3 point buffer calibration for pH).