The manufacturer informs:

A high-tech spoon with digital scale function and volumetric scale. When precision is important, the ISTA Digital Spoon Scale is the perfect tool for the professional aquarist. Precise and easy to use, it ensures accurate dosing of any supplement or food up to 300g with an accuracy of 0.1g. The LCD display will show results in grams or ounces and can be changed at the touch of a button. It is corrosion-resistant and coloured to resist stains. 

CHARACTERISTICS:

• It ensures accurate measurement of any supplement or food.
• Measures up to 300g with an accuracy of 0.1g
• Corrosion-resistant
• Simple operation with just 3 buttons
  

Works on battery (included) with easy access to the battery compartment.