1With a mini display and no backlight, it can display the measurement results intuitively and clearly, convenient to use. 2Support salinity, PH, TDS, EC, ORP measurement, stable performance, to help you conduct water quality testing. 3With a high-accurate detachable probe, the measurement error is small, which can prevent accidental damage of the probe. 4Suitable for domestic water, food salinity, fish tanks, aquarium, farmland, swimming pool, aquaculture, laboratory, etc. 5The waterproof and dustproof grade is IP67, supports short time immersion, convenient for seawater testing and water quality testing.Condition: 100% Item Type: Water Quality Tester Material: ABS, Electronic Component Uses: Seawater Testing, Water Quality Testing Battery: 3 x 1.5V 100MAH LR44 Button Battery Weight: Approx. 170g / 6 oz Product Size: Approx. 183x37mm / 7.2x1.5in }1 x Water Quality Tester1 x Instruction Manual1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.