【Highly Accurate and Reliable pH Meter】 - Ensure the quality of your water with this highly accurate pH meter for water, providing accurate readings at ±0.01pH. With its sensitive glass electrode, it measures a wide pH range from 0.00 to 14.00 pH, ideal for swimming pools, aquariums, hydroponics, drinking water and spas. Clear digital readings make water tests fast and reliable. 【Automatic Temperature Compensation】 - The advanced automatic temperature compensation (ATC) technology built into this pH meter ensures that your readings remain accurate and stable, even when temperatures fluctuate. Ideal for environments such as aquariums, swimming pools or garden facilities where temperature varies. QUICK Calibration & Easy Operation: Calibrating your pH pen couldn't be easier. Simply dip the probe into your calibration solution and press the "CAL" button - no extra tools or complicated steps. It is easy to use for beginners and experienced users. Compact, lightweight and portable design: take this compact water tester with you wherever you go. Its lightweight pen style design fits comfortably in your pocket or bag, making it perfect for on-the-go testing at home, garden, beach, camping or in any travel situation. 【Complete Kit & Customer Service】- Package includes: 1 x digital pH meter for water (blue).