Requests: Ideal for all home and lab TDS and pH testing applications including aquariums, swimming pools pH meter: full measurement range from pH 0-14, reliable and fast readings 3 inch -1 TDS meter: Measurement range 0-9990ppm, 0-9990μs/cm; Accuracy ±2%, 0.1-80.0°C, 32.0-176.0°F; To note: This meter cannot test sea water Features: Self-contained protective case; Lightweight portable design, easy to carry Includes: pH meter, 3 in 1 TDS meter, 3 calibration pads We only sell pH sets- meters, not other items in the picture. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. In Due to manual measurement, please allow slight size errors.