Feature: 1. With LED LCD dual display, the measurement results can be clearly and visually displayed. 2. Hand-held design, small in size, light in weight, easy to carry around. 3. The salinity detection range is 0-9999 mg/L, the measurement accuracy is high, and the reaction is sensitive. 4. Applicable to tap water, pure water, purified water, mineral water, freshwater aquaculture, freshwater aquarium, rivers and lakes, well water, swimming pool. 5. Made of high-quality materials, corrosion-resistant, wear-resistant and durable. 6. With data hold function, easy to operate, convenient to use. Specification: Condition: 100% Brand New Item Type: Salinity Meter Material: Plastic Color: As shown in the picture Size: Approx.18.5x3.8x3.8cm / 7.3x1.5x1.5in(without Probe Cover) Weight: Approx.217g/7.7oz Battery: 4 x 1.5V AG13 button battery(Not included) Salinity Measurement Range: 0～9999 mg/L Salinity Resolution: 1mg/L Salinity Accuracy: ±2mg/L±2%FS Calibration Point: Salinity: 6440mg/L(12.88mS/cm) point calibration Automatic Temperature Compensation: 0~50°C Temperature Display: 0.1℃/°F Operating temperature: 0~50℃ (32~122°F) Package List: 1 x Salinity Meter Note: 1. The instrument belongs to professional instruments. For non-professionals, please operate under the guidance of professionals to avoid malfunction of the instrument 2. Please follow the correct operation steps and use the standard buffer calibration. Incorrect calibration will cause the measurement error to exceed the standard Do not press the CAL key in the uncalibrated state, otherwise the instrument will be incorrectly calibrated. Cause the instrument to not work properly or the measurement error is seriously exceeded.