This product is a liquid testing drop used for checking the Oxidation-Reduction Potential (ORP) of water. It is also known as a redox potential test kit. 

• The drops are used to test the ORP level of water, which indicates its oxidising or reducing potential. 
• Positive ORP values indicate oxidising conditions, while negative values indicate reducing conditions. 
• The drops are designed for easy use, and the results are often determined by a color change in the water after adding the drops. 
• This type of product is used to assess water quality in various applications, including with water ionisers and in aquariums. 
• The product is not for consumption, and water with these drops should not be consumed.