1. Test the pH level and temperature of solution/water with data hold function. 2. Pocket size, and portable with switchable backlight & large LCD display for clear reading. 4. ATC function (automatic temperature compensation), automatic calibration and IP65 fully waterproof design. 3. Replaceable pH sensor probe - The electrode probe can be replaced with insert type design for convenient and fast replacement. 5. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, swimming pools and other water systems., Weight: 0.05291094288 Pounds, Manufacturer: Jaywool