The accuracy of pipetting depends on precise graduations on your serological pipette and on your ability to accurately match the liquid's meniscus with the graduation mark. The PIPETBOY pro enables the user to very accurately displace liquid in the pipette by applying variable finger pressure on its pipette triggers.To operate a PIPETBOY pro simply fully press the aspiration trigger to quickly draw liquid into the pipette until almost full, then gradually release the trigger to reduce speed and accurately match the meniscus to the graduation mark. Similarly, when dispensing, slightly press the trigger for drop-by-drop dispensing of liquid, or fully trigger the powerful pump motor for fast emptying of the pipette. Accurate and reliable results can be achieved quickly even by occasional users at pipetting speeds of up to 12 ml/ sec.