Features:Digital TDS Meter Tester Filter Water Quality Purity Test the quality of various water ensuring you are enjoying the best quality water. Ideal for using in the following situations: drinking water water filters hydroponics aquariums food&coffee pools&spas. TDS range: 0-9990ppm /mg / L. Resolution: 1ppm(0-999ppm),10ppm(1000-9990ppm)Auto shut-off: 10minutes. Data hold. Auto temperature compensation. Specification: Accuracy: ±2% full scale Dimensions: 142 x 25 x 15 mm. Battery: 2 x 1.5v button cell battery （included)Color: BlueWeight: 40gPackage Weight: 51gPacking content:1 x TDS Tester