The Portable Pipet-Aid XL has a longer handle to reduce arm strain during pipetting. Its ergonomic design includes an adjustable sliding hand rest and a removable stand that allows you to set down the pipet without fear of contamination. The unit features a quieter more powerful pump, an EZ Grip nosepiece and a low battery LED indicator. Unit is supplied complete with a power supply charger, 4 extra filters and a holster-type wall bracket. 110V.