Checker Plus Ph Tester. A sturdy, compact pH meter which gives fast, accurate readings, displayed clearly on large LCD. The thin long-reach tube fits easily into test tube. Two-point calibration with automatic buffer recognition. Takes CR2032 cell (included).• Range: pH 0.00-14.00• Resolution: 0.01 pH• Accuracy: ±0.2 pH• Battery life: 1000 hours• Dimensions: 71 50 21 mm (excluding probe)• Weight: 50 g