AlkaZone Accurate Check pH Test Strips DescriptionRange: 2.0~10.0AlkaZone Accurate Check pH Test Strips Directions 1. Dip pH reagent strip into water sample for 1~2 seconds. 2. Remove and shake strip once, to remove excess water. 3. After 20 seconds, match color of strip to color chart provided with test strips.WarningsDo not touch test pads of strip. Do not remove desiccant. Remove only needful strips for immediate use. Replace cap immediately and tightly after use.