Professional PH TDS Meter Tester Set Combo of PH Meter and TDS Meter Features: This digital pen style pH meter is an ideal instrument for whatever you may need to test the pH levels. TDS Tester measures total dissolved solids (TDS) and temperature. Excellent pH Meter & TDS Tester, very accurate and durable. LCD display screens let you easily read the displayed value. This TDS Tester can be Used in: Water Purifiers and Filters, Food (Vegetable, Fruits) & Drink Quality Monitoring, Pools and Spas, Aquariums, Hydroponics. This Pen Style pH Meter is accuracy for Testing PH Level of Liquids in Various Applications, it is an ideal Tool for Aquarium, fishing Industry, Swimming Pool, School Laboratory, Spas and Food etc. Specifications: pH Meter: Measuring pH Range: 0.0 – 14.0pH Resolution: 0.1 pH Accuracy: Operating Temperature: Calibration: Manual,1 point Dimensions: Approx. 152mm x 29mm x 17mm / 5.98″ x 1.14″ x 0.67″ Batteries:3x 1.5V AG-13 Button battery (included) TDS Tester: Color: Beige Accuracy: ±2% Rang: 0-999ppm (1ppm resolution); 1,000-9,990ppm (10ppm resolution) Dimensions: Approx. 155mm x 28mm x 15mm / 6.1″ x 1.1″ x 0.59″ Battery: 2 x 1.5V Button Cell battery (included) Package Includes: 1 x pH Meter with case 1 x TDS Tester with case 1 x pH Meter User Manual 1 x TDS Tester User Manual 1 x Calibration Adjustment Screwdriver