Feature 1Easy to use, the digital water quality TDS tester has a backlight display, which is convenient for you to read the data. 2It is suitable for testing total dissolved solids (TDS) in all households and laboratories, including aquariums and swimming pools. 3Comfortable to hold, lightweight handheld design with protective cover for portability and comfort. 4Lightweight and portable, small in size and light in weight, it is convenient to carry and use to measure water quality. 5It is suitable for testing water, soil, swimming pools, aquariums, spas, hydroponics, food, beverages, wine and beer, etc.Item Type: TDS meterMaterial: PlasticWeight: Approx. 114g / 4ozProduct Size: Approx. 151x33x17mm / 5.9x1.3x0.7inColor: GreenRange: 0.00~1999ppm(mg/L)Resolution: 1ppm (mg/L)Accuracy: 2%F.SBattery: 4x1.5V button battery (not included)Temperature Compensation: 0~50Working Temperature: 0~50Application: Suitable for testing total dissolved solids (tds) in all households and laboratories, including aquariums and swimming pools. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x TDS Tester (Battery Not Included)1 x Screwdriver1 x Manual