PH Meter & TDS Meter Digital Water Quality Tester 0-14 PH Meter Tester 0-9990PPM
Users can use it directly. Total concealed fit in your bag or pocket for easy, casual carrying. Accuracy: 0.01. ~Key Features~. Power source: 2 x 1.5 V(LR44 Button Cell) (not included). Display: LCD Digital.