Product Description: Water TDS Meter Tester Package Contains: It has 1 Piece of Water TDS Meter Tester Material: PlasticSpecial Feature: Portable, Automatic Shut-Off, High AccuracyCombo Pack : Pack of 1Dimension: 5.43*1.02 inchWeight: 100gmAdditional Information:TDS range: 0 - 990ppm (mg/L), Accuracy: +/- 2%TDS stands for Total Dissolved Solids, which are the inorganic salts and organic matter in a liquid. This includes calcium, magnesium, sodium, etc.Do not immerse meter in liquid beyond the maximum immersion level of 4 cm.Do not store meter in high temperatures or in direct sunlight.Battery: 2x LR44 Read Less