Pipetman M has been designed to offer guaranteed accuracy and precision in both standard and repetitive pipetting modes. It is a unique pipette with only two buttons to enable the pipette and reach all the menu options. It's easy to perform large number of applications with an intuitive interface featuring five pipetting modes:Standard, Reverse, Repetitive, Mix, or Custom (personalized mode), access to factory calibrated settings, and independent speeds for aspirating and dispensing for varying solution densities. These pipettes are GLP-Compliant with lockable volume, service alert reminders, color-coded push-button corresponds to matching Gilson Pipetman Tips, serial numbers engraved on the pipette, and 8 ID tags for personalization. The exclusive patented piston drive mechanism allows for a uniform sample delivery each and every time. With the advanced Pipetman M software, you can confidently transfer your unique protocols with improved security - easily lock the pipette to prevent unwanted modification.