TARSONS - Steripette Pro (2040X).

Lightweight and UV resistant with Lithium Ion Battery. A cordless pipette
controller provides the power and responsiveness you need. Whether
working with large or small volumes, or standards or viscous solutions, it
allows accurate, precise measurement with easy two-speed fingertip
control. Choose from the fast transfer, slow and controlled aspiration and
deliveries, or a combination of speeds. There are no dials to adjust, and
the gravity-drain feature releases liquids smoothly with no utilization of
battery power.