Features: 5-in-1 water quality tester: The Acidity meter can display Acidity,TDS,Temp data synchronously when measuring water, no need to switches back and forth with buttons. The Acidity tester screen is rich in color, and the readings can be clearly display even during night measurement, and the data is clear. The water quality detectors adopts a corrosion-resistant high-sensitivity probes, with high precisions of measurement result and fast and accurate readings. The water quality monitors is power by 4pcs button batteries.with bluetooth-compatible connection function. Easy to use: one-button operating after power, the size is easy to carry. Specifications: Material:ABS Acidity: 0-14pH TDS: 0-19900pmm Temperature: 0°℃-50°℃ (32°F-122°F) Support bluetooth-compatible connection Size:Approx.220mm/8.66''x45mm/1.77'' Package Includes: 1Piece Water Quality Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.