Feature: 1. High Response Rate: The PH tester supports low impedance to ensure a high response rate, which is convenient for your operation. 2. Backlight Display: PH meter adopts automatic backlight display, which automatically turns on the backlight display when it is turned on, and the value can be seen clearly even in dark conditions. 3. Storage Box: Tap the screen to lock, long press to switch between Celsius/Hua degrees, the TDS meter is equipped with a storage box, which is convenient for you to carry. 4. ABS Material: The PH tester is made of high quality ABS material, which is wear resistant and durable, and can be used for a long time. 5. Applicable Scenarios: PH tester is suitable for all household and laboratory test applications, including aquariums and swimming pools. Specification: Item Type: PH Tester Material: ABS Specification: 1 Set Use Battery: 2 Button Batteries LR44 (Ship with Inbuilt Battery) Battery Capacity: 280mAh TDS Measurement Range: 1-9999ppm Resolution: 1ppm Accuracy: ±2% EC Measuring Range: 1-9999μS/cm Resolution: 1μS/cm Accuracy: ±2% PH Measurement Range: 0.00-14.00pH Resolution: 0.01ph Accuracy: ±0.05 Working Temperature: 0°C-60°C (32-140°F) Automatic Temperature Compensation: 0°C-60°C. Package List: 1 x Host1 x Manual3 x Packs Calibration Powder1 x Storage Box Note: Ship with Inbuilt Battery