PH-009I is a wireless and battery-powered digital pH meter in pen format. Perfect for when you need to measure the pH value of your aquarium, fish pond or in lake water. The meter covers the entire pH scale from 0.0-14.0, works in water between 0-50 degrees Celsius and provides an answer in just 1 minute. The pH meter is easy to use and compact enough to be easily taken with you wherever you need to measure the pH value.br - Digital pH meter in pen formatbr - Works in water at temperatures between 0 and 50 degrees Celsiusbr - Capable of measuring the entire pH scale from 0.0 - 14.0br - Provides an answer in just 1 minutebr - Perfect for the aquarium, fish pond or lakebr Specificationsbr Color Yellowbr Material Plasticbr Size 2.5cm x 15cm x 1cmbr Weight 47 gbr Battery 3x AG-13 button cell battery 1.5Vbr Precision +/- 0.1 pH at 20 degrees C/68 degrees Fbr Range 0.0-14.0 pHbr Working life approx. 700 hoursbr Package Containsbr 1x pH meterbr 3x AG-13 batterybr 1x Screwdriverbr 2x 250ml pH buffer powderbr 1x User manual English