The Matrix Impact Single Channel Electronic Pipette 5 - 250 uL, with stand and power supply. Features step-based programming that allows users to perform pipetting routines that cumbersome or impossible with manual pipettes and the on-board memory saves six programs (up to 40 steps each). Five volume ranges increase flexibility to perform everything from micropipetting to large volume repeat dispensing. Advanced battery technology allows days of work between charges with no effect on the memory. Stepper motor technology and error correction software ensure accurate and precise pipetting, even when performing incremental dispensing or when operating at top or bottom of pipette's volume range. To top off all the advanced features, this pipette can be used while plugged in, so there is no down time during recharging.