PH-009(I) is a wireless, battery-powered digital pH meter in pen format. Ideal for measuring the pH value of your aquarium, fish pond, or lake water. The meter covers the full pH scale from 0.0 to 14.0, operates in water temperatures between 0 and 50 degrees Celsius, and delivers results in just 1 minute. The pH meter is easy to use and compact enough to carry conveniently wherever you need to take measurements. - Digital pH meter in pen format - Operates in water temperatures between 0 and 50 degrees Celsius - Measures the full pH scale from 0.0 to 14.0 - Delivers results in 1 minute - Ideal for aquariums, fish ponds, or lakes Specifications: Color: Yellow Material: Plastic Size: 2.5cm x 15cm x 1cm Weight: 47g Battery: 3x AG-13 button cell batteries (1.5V) Accuracy: +/- 0.1 pH (at 20 degrees C / 68 degrees F) Range: 0.014.0 pH Operating life: Approximately 700 hours Package Includes: 1x pH meter 3x AG-13 batteries 1x Screwdriver 2x 250ml pH buffer powder 1x User manual (English)