Efficiency, versatility, and precision are combined into one simple, yet sophisticated tool with these new, improved pipettors. Pre-programmed to perform the most common dilutions and provide high accuracy andprecision handling for micro-volumes of liquids. Self-calibrating, microprocessor-based system reduces the possibility of human error and instrument contamination by controlling pipetting speed, calibration, and volume selection. Helps reduce the risk of repetitive strain injuries that are frequent with manual pipetting. Has over 1000 cycles when fully charged.