Widely used in aquariums, glass fishponds, mining, pharmaceutical research, agriculture, laboratories, water environments, colleges and universities, quality control, and other fields. Features: - A set of 2 instruments for convenient water quality testing - Digital pH pen with automatic temperature compensation - Compatible with buffer powder for calibration - TDS meter features hold function and auto power-off (note: not suitable for seawater testing) - Displays water purity level in PPM (parts per million) on screen - Measures water temperature - Fast, accurate, and stable readings within seconds - Compact and portable design - LCD with backlight for clear reading and night-time monitoring Specifications: TDS & EC Meter: - Color: Blue - Conductivity: 0–9999 µS/cm - Temperature range: 0–80°C (32–176°F) - TDS range: 0–9999 ppm - Battery: 1 x CR2032, 3V, 240mAh - Item size: 153 x 30 x 14mm / 6.0 x 1.2 x 0.6in - Item weight: 44g / 1.5oz pH Tester: - Color: Yellow + Black - Measurement range: 0.00–14.00 pH - Resolution: 0.01 pH - Battery: 2 x LR44, 1.5V, 160mAh - Operating temperature: 0–60°C - Item size: 153 x 30 x 16mm / 6.0 x 1.2 x 0.6in - Item weight: 44g / 1.5oz Package dimensions: 160 x 60 x 60mm / 6.3 x 2.4 x 2.4in Package weight: 140g / 4.9oz Packing List: - 1 x TDS & EC Meter - 1 x pH Tester - 1 x pH Test Paper - 3 x pH Buffer Powder (4.01, 6.86, 9.18)