Feature: 1. 5 IN 1 TESTING: This water quality tester can check the salinity, temperature, pH, TDS water quality analysis, and conductivity of water, and the measuring results are accurate and reliable. 2. POWER SUPPLY: The water quality detector is equipped with a 1000mAH lithium ion battery, Type C charging, and charging for 2 hours, providing up to 35 days of normal operation. 3. AUTO SHUTDOWN: The water quality detector has an automatic shutdown function, which activates after 5 minutes of inactivity, helping to save battery life, efficient and practical. 4. HIGH SENSITIVITY: The PH testing pen uses sensitive Pt probe, high sensitivity glass probe, and 32 bit industrial grade superchip, providing measurement stability and accuracy. 5. TEMP COMPENSATION: With automatic temp compensation function, ensuring measurement within the temp range of 32‑140℉ (0‑60℃), minimizing errors caused by liquid temperature fluctuations. 6. APPLICABLE SCENES: This water detector is suitable for various water quality monitoring scenarios such as home, laboratory, and greenhouse, etc., helping you understand the water situation. Specification: Item Type: Water Quality Tester Salinity: 0.01%-10.0% PH: 0-14pH TDS: 0-9999ppm, 10-100ppt EC: 0-9999us/cm, 10-200ms/cm Temperature: 0-60℃, 32-140℉ Product Size: Approx. 16.2 x 3.5 x 3.5cm / 6.4 x 1.4 x 1.4in Battery: 1000mAH Lithium Ion Battery (built in battery) Product Feature: Color LCD display, lithium battery power supply, Type C charging Function: Manually switch the display mode, with switch on and off, automatic shutdown, pH 3 point calibration, EC 3 point calibration, restore factory settings, automatic temperature compensating, automatic switching range, power and charging indication. Material: ABS Weight: Approx. 238g / 8.4oz. Package List: 1 x Water Quality Detector1 x Connection Line1 x User Manual3 x Test Powder Packs1 x Storage Box