Ph/ec/temp 3-in-1 Test Pen Ph Value Water Quality Test Pen Pool Home Detection PH With Backlight

TDS/PH/thermometer 3 in 1 Measuring range: pH: 0.00-14.00 ph; EC: 0-19999 US/CM; Resolution: 0.01 ph; 1 US/CM Accuracy: ph: +/- 0.05 ph; EC: +/- 2%; temperature: +/- 0.5 °C Battery: 3*1.5V LR44 button battery (not included)