Portable water quality analyzer with high-definition display screen and manual one-key automatic calibration mode. Features a sealed top design to prevent energy consumption in wet environments. Provides accurate, simple, and quick measurements.Features: Pen cover design for easy portability, durability, and maintained sensitivity. Suitable for home use, hospitals, swimming pools, water treatment plants, laboratories, and aquaculture. High-definition display with large digital readout for clear and fast measurement. Manual one-key automatic calibration mode ensures accuracy even after long storage periods. Top-sealed construction enhances performance in humid or wet conditions. pH pen equipped with electrode probe, resistant to heat and cold, offering high sensitivity. TDS & EC pen features titanium alloy probe with high hardness, anti-rust, and oxidation resistance.Specifications: Type: Single Yellow pH Pen White TDS Pen & Yellow pH Pen White TDS Pen & pH Pen Blue TDS Pen & Yellow pH Pen Blue TDS Pen & White pH Pen (optional) Measurement Parameters: pH, TDS, EC TDS Measurement Range: 09990 ppm TDS Temperature Measurement Range: 0.180C / 32176F TDS Accuracy: 2% TDS Battery: 1 CR2032 button cell, 3V 240mAh (included) TDS Probe: Titanium alloy pH Measurement Range: 014 pH Resolution: 0.01 pH Accuracy: 0.05 pH Battery: 2 LR44 button cells, 3V 240mAh (included) pH Probe: ElectrodePackage Weight: 106g / 3.74 oz 190g / 6.70 oz Package Size: 150 30 20mm / 5.91 1.18 0.79 in 200 110 20mm / 7.87 4.33 0.79 inPacking List: 1 pH Test Pen 1 TDS & EC Test Pen 6 Calibration Powder Packets 2 Instruction Manuals